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Issue No. 05 • MICA (P) 207/10/2008<br />

AN NCCS BI-MONTHLY PUBLICATION<br />

July / August 2009<br />

...HELPING READERS TO ACHIEVE GOOD HEALTH<br />

Salubris is a Latin word which means healthy, in good condition (body) and wholesome.<br />

NCCS TEAM IS GETTING<br />

THE ANSWERS FOR<br />

LIVER CANCER


PAGE A2<br />

In Other Words<br />

FOR THE LOVE OF SCIENCE<br />

SALUBRIS<br />

July / August 2009<br />

DANIEL TAN speaks about his passion for science which<br />

led him to his research into how targeted drug works<br />

in nasopharyngeal cancer. CAROL ANG reports.<br />

Recently, the Department of <strong>Medical</strong> Oncology welcomed back two doctors.<br />

Amongst them is Dr Daniel Tan, who had been away for a nine-month<br />

fellowship programme in the UK. He is the second doctor to return from<br />

overseas, the first this year being Dr Ng Quan Sing. Five other doctors,<br />

namely, Dr Lynette Ngo, Dr John Chia, Dr Richard Quek, Dr Wong Nan Soon<br />

and Dr Ang Mei-Kim are still overseas and not due to return till 2010.<br />

Dr Tan is the first oncologist<br />

from <strong>Singapore</strong> to be conferred<br />

the Young Investigator Award<br />

from the American Society of Clinical<br />

Oncology (ASCO) <strong>Cancer</strong> Foundation.<br />

This award provides funding to promising<br />

investigators planning an investigative<br />

career in clinical oncology.<br />

Recalling fondly his stint overseas,<br />

Dr Tan revealed, “In my second year<br />

of study at St Bartholomew’s and<br />

The Royal London Hospital, we had<br />

8-week elective projects – ranging from<br />

library-based to lab-based ones – and<br />

out of curiosity, I picked the latter and<br />

ended up in the then Imperial <strong>Cancer</strong><br />

Research Fund at Lincoln’s Inn Fields.<br />

I was fortunate to have a very good<br />

mentor who showed me how research<br />

can challenge scientific dogma, with<br />

the aim of making a difference in<br />

patient care.” Dr Tan’s enthusiasm for<br />

knowledge was so great that he even<br />

took a year out to do an intercalated<br />

BSc degree in tumour biology.<br />

It is precisely this investigative spirit<br />

and an avid interest in making new<br />

discoveries that has brought Dr Tan<br />

to his current vocation as oncologist<br />

and clinician-scientist at the NCCS.<br />

Nursing a passion for Science<br />

since he was a child, Dr Tan knew<br />

his dream job would be one that<br />

allows him to apply knowledge in a<br />

practical meaningful way. “Medicine<br />

provided the right mix of human<br />

interaction and applied science,”<br />

he said. And, at the age of 16, Dr Tan<br />

started medical school in London<br />

and now holds BSc (Hons), MBBS<br />

and MRCP qualifications.<br />

He returned in 2002 to be enrolled into national service where he spent a year in the Diving<br />

Medicine Section. In 2004, Dr Tan joined SingHealth, and undertook the rotations through<br />

various departments as a medical officer at the <strong>Singapore</strong> General Hospital. Three years<br />

later, he began his career in oncology but took off again shortly on a <strong>National</strong> <strong>Medical</strong><br />

Research Council Fellowship to the Drug Development Unit of The Royal Marsden Hospital,<br />

a leading cancer centre in the UK, with full support and encouragement from the NCCS.<br />

For this, he gratefully acknowledges the medical oncology department for creating a highly<br />

conducive environment for personal development, where peers and seniors work towards a<br />

common goal to deliver better care and treatment options to patients – and early phase trials<br />

may be a way forward.<br />

“During my nine months there, I learnt how to innovate the design of Phase I trials, care for<br />

participating patients, as well as interact with pharmaceutical companies and collaborating<br />

overseas Phase I units in Europe and US. It was also quite an experience prescribing novel<br />

drugs available at the unit, knowing well that some of them might become the standard of<br />

care in the next five to 10 years.” He further recounted that some patients could be seen to<br />

benefit even in the context of Phase I trials, which are traditionally regarded as dose titration<br />

experimental studies. “In the era of targeted therapy, and non-invasive molecular platforms,<br />

there is now scope to rationally improve the chances of patient benefit from novel drugs, as<br />

well as gain insight to basic tumour biology.”


PAGE A3<br />

In Other Words<br />

SALUBRIS<br />

July / August 2009<br />

“Despite the slew of<br />

exciting drugs coming<br />

through, we remain<br />

cautiously optimistic,<br />

and at the end of the day,<br />

patient care and safety<br />

remains the priority.“<br />

Dr Daniel Tan<br />

However, beyond the high tech<br />

translational science, he added “I<br />

would say I still derived the greatest<br />

satisfaction treating patients and seeing<br />

them get better. Some of the patients I<br />

met at the hospital were also refreshingly<br />

enlightened. They participated in trials<br />

with the hope of helping others even<br />

though there was a chance that it would<br />

not benefit them,” he added.<br />

As the Young Investigator Award is given<br />

to applicants during their transition<br />

from a fellowship programme to a<br />

faculty appointment, it was shortly<br />

before he returned to <strong>Singapore</strong> that he<br />

received this honour.<br />

“I am glad that the proposal came<br />

through the peer-review process and was<br />

selected for funding by a highly regarded<br />

international scientific body. The most<br />

satisfying part is to have articulated an<br />

idea in the proposal and have someone<br />

take it seriously to the extent of providing<br />

funding, all in good faith,” he said.<br />

The grant from the award would go into<br />

his research on ‘Delineating Clinically<br />

Relevant Targets of Anti-Angiogenic<br />

Small Molecule Tyrosine Kinase Inhibitors<br />

in Nasopharyngeal Carcinoma’.<br />

“To put that simply, I am trying to<br />

understand why resistance develops in<br />

drugs targeting blood vessels, as well as<br />

find out how they work in nasopharyngeal<br />

cancer which affects about 400<br />

<strong>Singapore</strong>ans each year,” he explained.<br />

Now that Dr Tan is back, the clinicianscientist<br />

has to divide his time between the<br />

NCCS-VARI Laboratory, where he works<br />

with his mentor Prof Teh Bin Tean, and<br />

the clinic where he sees patients suffering<br />

from a range of different tumour types.<br />

Dr Tan was upfront about his role as an<br />

oncologist. “At first, I had reservations<br />

about a lifelong career in oncology.<br />

But I soon found it to be both a<br />

privilege and an extremely fulfilling<br />

undertaking to care for cancer patients.”<br />

Indeed for someone who is developing<br />

new drugs in oncology, Dr Tan remains<br />

circumspect on the role of a physician.<br />

“Despite the slew of exciting drugs<br />

coming through, we remain cautiously<br />

optimistic, and at the end of the day,<br />

patient care and safety remains the<br />

priority. Hopefully, our research efforts<br />

will shed some light to the current gaps<br />

in understanding cancer, and ultimately<br />

translate to improved care for patients.”<br />

Off work, this 31-year-old is on a constant<br />

quest to discover new gastronomic highs.<br />

He regularly goes for runs, waxes lyrical<br />

about wine together with good friends,<br />

and challenges himself to a therapeutic<br />

game of golf, when time avails.<br />

By Carol Ang


PAGE A4<br />

In Focus<br />

SALUBRIS<br />

July / August 2009<br />

NCCS TEAM IS GETTING THE<br />

ANSWERS FOR LIVER CANCER<br />

The NCCS team has come up with a modality to test drug<br />

combinations in laboratories and today their work has found<br />

its way to the patients who are on clinical trials. At the onset<br />

of this trial, a biopsy of the tumour from the patient was first<br />

taken and implanted into a mouse. The mouse underwent<br />

treatment with the use of one drug and its progress was<br />

monitored. Subsequently, other drugs were administered<br />

until the desired result was obtained.<br />

Thus far, the team has tested a combination of two drugs, both of which are produced by two different giant pharmaceutical companies, for liver<br />

cancer. The combination of two drugs was found to be more effective than the use of one drug. Based on this discovery, a Phase I clinical trial<br />

testing on liver cancer patients for this two-drug combination was conducted. Twenty-seven patients participated in this trial and the results were<br />

encouraging, with complete shrinkage of the tumour in a few patients. A Phase II trial will be launched on some 59 patients later this year.<br />

The team behind this timely<br />

discovery comprises of Adjunct<br />

Professor Huynh Hung from<br />

the NCCS Humphrey Oei Institute of<br />

<strong>Cancer</strong> research (Division of Cellular<br />

and Molecular Research) and clinician<br />

investigators Dr Toh Han Chong, Head<br />

of the Department of <strong>Medical</strong> Oncology<br />

and Dr Choo Su Pin, Consultant for the<br />

Department of <strong>Medical</strong> Oncology.<br />

Professor Hui Kam Man, Director, Division<br />

of Cellular and Molecular Research at<br />

NCCS said: “We could not have achieved<br />

this without the financial support from the<br />

<strong>Singapore</strong> Millennium Fund, the <strong>National</strong><br />

<strong>Medical</strong> Research Fund and the <strong>Singapore</strong><br />

<strong>Cancer</strong> Syndicate. They could see the<br />

significance of our project and gave us the<br />

necessary funding to make this a reality.”<br />

The team’s success has prompted more<br />

drug companies to come together and<br />

use NCCS as a platform to best their drug<br />

combinations. More clinical trials are in<br />

the works.<br />

However, exemplary treatment<br />

methods are futile if patients are late<br />

in seeking medical attention. Majority<br />

of liver cancer fatalities could have<br />

been prevented with early detection.<br />

Thus, for NCCS’s 2nd Liver <strong>Cancer</strong><br />

Awareness Campaign in September<br />

this year, great emphasis was placed<br />

on raising public awareness and<br />

encouraging more people to do<br />

health screenings.<br />

To reach out to more households,<br />

public forums will be held at the Paya<br />

Lebar Kovan Community <strong>Centre</strong> on 12<br />

and 13 September 2009. The forums<br />

will be presented in English and<br />

Mandarin. All attendees are entitled<br />

to free goodie bags and vouchers for<br />

free Hepatitis screenings at SingHealth<br />

Polyclinics. Madam Cynthia Phua,<br />

MP for Aljunied GRC, who will be<br />

launching the LiCAM campaign urged<br />

the public to go for regular medical<br />

screenings, their best defense against<br />

the disease.<br />

The campaign will focus on information<br />

on the latest treatment methods and<br />

care for liver cancer patients, the risk of<br />

Hepatitis and how to avoid contracting<br />

fatty liver. Fatty liver is a condition that is<br />

likely to become more common among<br />

affluent <strong>Singapore</strong>ans.<br />

It is expedited when fat accumulates in<br />

Hepatocytes, or tiny sacs of liver cells.<br />

Although fatty liver is a benign condition,<br />

it can give rise to a wide spectrum of<br />

liver diseases, lead to inflammation and<br />

scarring of the liver and eventually, liver<br />

cancer if left undetected. The campaign is<br />

sponsored by Bayer Healthcare.<br />

Dr Tan Yu Meng, Deputy Head and Senior<br />

Consultant, Department of Surgical<br />

Oncology, NCCS and Surgical Director,<br />

Liver Transplant Programme, SGH, who<br />

spearheads the Liver <strong>Cancer</strong> Awareness<br />

Month Committee said, “Early detection<br />

is the best solution for liver cancer<br />

as often by the time the patients are<br />

brought to our attention it is too late for<br />

treatment. Hence, we hope to raise public<br />

awareness so that they will come forward<br />

and take advantage of the free screening.”<br />

With greater public<br />

awareness and improved<br />

cancer treatments, liver<br />

cancer patients may<br />

look ahead with lighter<br />

hearts as NCCS brings its<br />

research work from the<br />

bench to the bedside.


ADVANCES IN RADIOTHERAPY<br />

IN THE MANAGEMENT OF<br />

EARLY PROSTATE CANCER<br />

PAGE C1<br />

Under The Microscope<br />

SALUBRIS<br />

July / August 2009<br />

INTRODUCTION<br />

Prostate cancer is a cancer whose incidence has been<br />

steadily increasing over the last 35 years. It is typically<br />

found in men older than 50 years but its incidence<br />

varies greatly around the world. In <strong>Singapore</strong>, it is<br />

now the 3rd most common male cancer.<br />

By Dr Terence Tan<br />

Sr Consultant Radiation Oncologist,<br />

Dept of Radiation Oncology,<br />

NCCS<br />

Early prostate cancer refers to cancer confined to the prostate (stage I & II) and these may be managed<br />

by surgery, radiotherapy or active surveillance. Locally advanced prostate cancer on the other hand is<br />

best treated by a combination of androgen suppression therapy and radiotherapy.<br />

This article looks at advances in the use of radiotherapy in the management of localised prostate cancer.<br />

DOSE<br />

It is now generally accepted that there is a doseresponse<br />

curve for prostate above the conventionally<br />

given 66 Gy. Studies from the Memorial Sloan-<br />

Kettering <strong>Cancer</strong> Center and M.D. Anderson <strong>Cancer</strong><br />

Center have shown that patients have improved<br />

relapse-free survivals when given doses above 70<br />

Gy. While studies into the delivery of even higher<br />

doses are on-going, the current recommendation is<br />

for doses of at least 74 Gy (minimum tumour dose)<br />

to be delivered.<br />

Dose escalation studies began in the era of 3-D<br />

conformal radiotherapy and it was noted that<br />

while increases in the total dose delivered to the<br />

tumour improved disease-free survival, rectal and<br />

bladder morbidity rates also increased. That was<br />

until the advent of Intensity Modulated Radiation<br />

Therapy (IMRT).<br />

IMRT<br />

Intensity modulated radiotherapy is a very sophisticated form of radiation where<br />

the cross-sectional exposure of each treatment beam is not uniform as in the<br />

past but is varied by computer control (intensity-modulated) such that parts of<br />

the beam passing through sensitive normal structures have reduced exposure<br />

rates while parts which pass through tumour and not normal tissues have higher<br />

exposure rates.<br />

In this way, when a number of such treatment beams are arrayed around the<br />

patient, the high-dose treatment volume can be made to envelope the tumour<br />

target volume very conformably while sparing the surrounding normal tissues to<br />

a degree even greater than the previously used 3-D conformal techniques.<br />

Even within the treatment volume, it is possible to vary the dose (dose-paint),<br />

giving for example a radical dose to the tumour proper while delivering a lesser<br />

prophylactic dose to the draining lymphatics, all within the same treatment<br />

session. The availability of this technology has made dose escalation to very high<br />

levels possible with even less side-effects. IMRT has been in use at the <strong>National</strong><br />

<strong>Cancer</strong> <strong>Centre</strong> <strong>Singapore</strong> (NCCS) since 2001.<br />

Continued on page C2.


PAGE C2<br />

Under The Microscope<br />

SALUBRIS<br />

July / August 2009<br />

ADVANCES IN RADIOTHERAPY<br />

IN THE MANAGEMENT OF<br />

EARLY PROSTATE CANCER<br />

Continued from page C1.<br />

IMAGE GUIDED RADIOTHERAPY<br />

The prostate is a very mobile organ. Its position varies from day to day depending<br />

on the contents in the rectum and bladder. In the past, the uncertainty of the<br />

prostate’s position was dealt with by using larger treatment volumes. But this<br />

would mean a greater volume of normal tissue being irradiated. However, if the<br />

position of the prostate can be determined before each treatment, then smaller<br />

margins can be applied in the treatment volume. Methods of prostate localisation<br />

include ultrasound and the use of fiducial markers implanted within the prostate.<br />

In the latter method, images taken using the treatment machine’s on-board<br />

imaging device are compared with the images obtained during treatment planning.<br />

If the prostate is found to have shifted, then adjustments are made to align the<br />

radiation beam with the organ. This procedure is critical to IMRT as it helps ensure<br />

that the high-dose volume is accurately delivered to the prostate while the smaller<br />

margins required helps reduce the side-effects even when high doses are given.<br />

The most accurate method currently available is Dynamic Targeting Image Guided<br />

Radiotherapy where treatment machines are equipped with an on-board CT<br />

facility which is used to do scans of patients each day before treatment.<br />

These scanned images are the most accurate representation of the shape and<br />

position of a patient’s tumour or involved organ at the time of treatment.<br />

Adjustments based on these images help maximise the dose to the targeted organ<br />

while minimising the damage to the surrounding normal tissues.<br />

Gold fiducial markers have been used in the treatment of prostate cancer here<br />

since 2004 and NCCS installed its first dynamic targeting IGRT machine in 2007.<br />

HORMONES<br />

Prostate cancer is generally a hormone-responsive disease and there is much<br />

experience in the use of hormones in the treatment of advanced or metastatic<br />

disease. There is now also evidence to show that in selected patients the addition<br />

of androgen suppression therapy to radiotherapy improves disease-free survival<br />

and possibly even overall survival.<br />

BRACHYTHERAPY<br />

Brachytherapy is a method of radiation where radioactive seeds are implanted<br />

into the prostate to effect treatment from within. In the past, its use was limited by<br />

the inability to properly implant these radioactive sources into the prostate. With<br />

improvement in technology, we now have good imaging equipment to plan as well<br />

as monitor the placement of the seeds and modern devices which facilitates very<br />

good implantation transperineally with the use of needles.<br />

The advantage of this method of treatment is that much higher radiation doses can<br />

be concentrated in the prostate while sparing the surrounding tissue.<br />

THE FUTURE – CHARGED<br />

PARTICLE IRRADIATION?<br />

Charged particles such as protons<br />

or carbon ions can be focused<br />

even much more highly compared<br />

to photons and have the potential<br />

for even greater relative sparing<br />

of the surrounding normal tissues.<br />

Their biological effectiveness is also<br />

higher than the usual x-rays used in<br />

radiotherapy.<br />

This makes dose escalation to even<br />

higher doses feasible with even<br />

lesser morbidity to surrounding<br />

normal tissues. They, however,<br />

require very expensive facilities<br />

and are available in only very<br />

few research centres around the<br />

world. With the accumulation of<br />

experience from these centres and<br />

hopefully with technology becoming<br />

more affordable with time, it is<br />

hoped that such treatment would<br />

become more widely available for<br />

the treatment of prostate as well as<br />

other cancers in the future.


RATIONAL APPROACH TO<br />

TESTICULAR SWELLING<br />

PAGE C3<br />

Spotlight<br />

SALUBRIS<br />

July / August 2009<br />

Conditions of the scrotum and its contents often worry the<br />

individual enough to seek medical attention. Most scrotal<br />

conditions are benign and self-limiting, but it is important<br />

to diagnose the odd testicular malignancy that is potentially<br />

fatal if missed. The clinician evaluating should differentiate<br />

benign from malignant diseases, pursue a cost-effective<br />

diagnostic evaluation, and initiate appropriate urological<br />

referral when indicated.<br />

By Dr Lee Fang Jaan<br />

Registrar,<br />

Dept of Urology<br />

Dr Tan Yeh Hong<br />

Consultant,<br />

Director of Endourology,<br />

Director of Laparoscopy,<br />

Dept of Urology<br />

<strong>Singapore</strong> General Hospital<br />

Patients with a palpable mass in the<br />

testis should be suspected of having<br />

testicular cancer; especially if there<br />

is a previous history of undescended<br />

testis, even if surgically repaired.<br />

Differential causes of testicular<br />

swelling include torsion and<br />

infection. When the swelling can<br />

be felt separate from the testis,<br />

differential diagnoses to consider<br />

include incarcerated hernia,<br />

spermatocele and varicocele. Acute<br />

pain in the testis suggests torsion.<br />

Painful enlargement may be due to<br />

scrotal abscess. Pain and tenderness<br />

adjacent to the testis may be due to<br />

epididymitis or a varicocele. Tenderness<br />

of the testis itself may reflect orchitis.<br />

However, an underlying neoplasm<br />

should always be considered.<br />

Accurate diagnosis requires a careful<br />

history and structured physical<br />

examination, including urinalysis.<br />

Radiological studies such as scrotal<br />

ultrasound and Doppler blood flow<br />

are performed in selected patients<br />

with uncertain diagnosis.<br />

Examination of the scrotum is best<br />

performed with patient standing.<br />

A warm room and warm examining<br />

hands helps as cold temperature<br />

causes contraction of the dartos and<br />

cremasteric muscle and elevation<br />

of the testis toward the external<br />

inguinal ring. The left testis usually<br />

lies lower than the right and the<br />

scrotal sac is hypoplastic when its<br />

gonad is absent.<br />

Palpation is carried out by<br />

systematically examining the testis,<br />

epididymis, and cord for size and<br />

consistency. The exact nature and<br />

location of scrotal mass should be<br />

determined. When transilluminated,<br />

fluid filled structures (e.g. hydrocele)<br />

radiate a reddish glow.<br />

Testicular pain should always be<br />

considered an emergency. Evaluation<br />

should not be delayed if testicular<br />

damage from torsion of the spermatic<br />

cord and subsequent ischemia are to<br />

be avoided. Differentiation between<br />

testicular torsion and epididymitis is<br />

usually possible on the basis of the<br />

presentation and physical findings.<br />

Testicular pain should<br />

always be considered an<br />

emergency. Evaluation<br />

should not be delayed if<br />

testicular damage from<br />

torsion of the spermatic<br />

cord and subsequent<br />

ischemia are to be avoided.<br />

Continued on page C4.


PAGE C4<br />

Spotlight<br />

SALUBRIS<br />

July / August 2009<br />

RATIONAL APPROACH TO<br />

TESTICULAR SWELLING<br />

Continued from page C3.<br />

Some 90% of testicular torsions occur in<br />

men younger than 30 years old. A teenager<br />

with sudden onset scrotal pain and a normal<br />

urinalysis most likely has testicular torsion.<br />

Unrelieved torsion (longer than six hours)<br />

leads to testicular ischemia and atrophy. A<br />

delay in diagnosis longer than 12 hours will<br />

result in irreversible damage.<br />

Testicular torsion can be confirmed by<br />

Doppler ultrasound (greater than 90%<br />

sensitivity, 70% specificity). However, if in<br />

doubt, scrotal exploration and detorsion<br />

should always be performed. The common<br />

anatomical defect is high “investment” of the<br />

tunica vaginalis – the so called bell-clapper<br />

deformity. This inherent defect is usually<br />

bilateral, and detorsion should always be<br />

followed by testicular fixation (orchiopexy)<br />

of both gonads.<br />

If epididymitis or epididymo-orchitis is<br />

diagnosed especially with the finding of<br />

pus cells and bacteria on urine microscopy,<br />

the patient can be treated with a course of<br />

bactrim and doxycycline for two weeks. The<br />

etiology is commonly bacterial infection of<br />

the urinary tract.<br />

In sexually active young adults especially<br />

when associated with urethritis, chlamydial<br />

and neisseria gonorrhoeae infection must be<br />

considered. It is prudent to review the patients<br />

after treatment for resolution of symptoms<br />

and signs. If in doubt, an ultrasound scrotum<br />

should be ordered. An underlying testicular<br />

malignancy must still be a consideration.<br />

Testicular cancer is the most frequent cancer<br />

in young men (15 to 35 years of age).<br />

Cryptorchidism is a well-known risk factor<br />

even after orchiopexy. Testicular tumours<br />

usually present as painless lumps, but some<br />

men (20-25%) develop scrotal pain as a result<br />

of bleeding caused by rapid tumour growth<br />

and necrosis. Most tumours are discovered<br />

as hard testicular lumps detected on self<br />

examination. Reactive hydrocele may make<br />

appreciation of a testicular lesion difficult.<br />

Scrotal ultrasound is an excellent modality for the assessment of testicular<br />

mass. Testicular cancers are typically non-homogenous with hypoechoic<br />

areas. Testicular microcalcifications are associated with a high propensity for<br />

developing seminomas and warrants regular ultrasound surveillance.<br />

More than 95% of testicular tumours originate from germ cells. Germ cell<br />

tumours can be seminomas or nonseminomatous germ cell tumours. Seminomas<br />

are more likely to be confined to the testis (stage I) and are exquisitely<br />

radiosensitive. Nonseminomatous germ cell tumours consist of embryonal cell<br />

carcinomas, yolk sac tumours, or teratomas, alone or mixed with other elements.<br />

Sertoli cell tumours, Leydig cell tumours, and lymphomas are the most-common<br />

non-germ cell tumours. In men older than 60 years, most tumours are non-<br />

Hodgkin’s lymphoma, with a predilection for bilateral involvement.<br />

Tumour markers are helpful in the diagnosis, staging and management of malignant<br />

testicular tumours. α-fetoprotein (AFP) is often associated with embryonal<br />

carcinoma, whereas β-subunit of human chorionic gonadotropin (β-hCG)<br />

elevations occur with choriocarcinomas. However, many testicular cancers are<br />

mixed germ cell in origin and tumour marker elevation is variable. Persistent<br />

elevation of tumour markers post orchiectomy suggests the presence of metastatic<br />

disease. However, there is a 25% false-negative marker elevation rate.<br />

Avoidance of scrotal skin violation is mandatory when obtaining histological<br />

diagnosis. The lymphatics of the testes drain primarily into the retroperitoneal<br />

para-aortic and inter-aortocaval lymph nodes while the scrotal skin lymphatics<br />

drain into the inguinal nodes. Trans-scrotal needle biopsy or orchiectomy is<br />

therefore contraindicated. Suspected testicular tumours should be explored via<br />

an inguinal incision with early control of the spermatic cord to prevent vascular<br />

or lymphatic dissemination.<br />

Further treatment is based on histological<br />

assessment of the tumour and staging<br />

consisting of computed tomography (CT)<br />

scanning and chest x-ray. A false-negative<br />

rate on 20 to 25% occurs in the presence<br />

of non-enlarged (smaller than 1.5cm) but<br />

microscopically involved retroperitoneal<br />

lymph nodes. Treatment modalities include<br />

retroperitoneal lymphadenectomy, external<br />

beam radiation to the retroperitoneum and<br />

chemotherapy, alone or in combination.


40th SMA <strong>National</strong> <strong>Medical</strong> Convention<br />

BREAKING THE MYTHS<br />

ABOUT CANCER<br />

PAGE A5<br />

Community<br />

SALUBRIS<br />

July / August 2009<br />

In recent years, the number of cancer patients and<br />

high-risk groups have been on the rise. Consequently,<br />

more cancer prevention methods are finding their way<br />

to the media, having evolved from a wide variety of<br />

sources ranging from official cancer research centres<br />

to the good neighbour next door.<br />

While it is good to have choices, the same cannot be<br />

said for making flawed choices, which are a waste of<br />

time and money better spent on prevention methods<br />

that are actually effective.<br />

To dispel mistaken notions about cancer prevention, the 40th SMA <strong>National</strong><br />

<strong>Medical</strong> Convention based its theme on “<strong>Cancer</strong> Prevention – Breaking the<br />

Myths”. The <strong>National</strong> <strong>Cancer</strong> <strong>Centre</strong> <strong>Singapore</strong> (NCCS) was one of the few<br />

institutions to collaborate with the <strong>Singapore</strong> <strong>Medical</strong> Association to organise this<br />

event. Madam Halimah Yacob, MP for Jurong GRC, was the Guest-Of-Honour to the<br />

event held at Suntec City Convention <strong>Centre</strong> on 11 July 2009.<br />

As cancer is the<br />

principal cause of<br />

death in <strong>Singapore</strong>,<br />

the convention sought<br />

to provide objective<br />

insights on cancer<br />

prevention, with the<br />

consequential goal of<br />

reducing the number<br />

of cancer patients and<br />

cancer-related deaths<br />

in the long run.<br />

To expand its outreach to the general public, the morning public seminar was held<br />

in three concurrent sessions in English, Malay and Mandarin. Dr Wong Zee Wan,<br />

Senior Consultant from the Department of <strong>Medical</strong> Oncology, was one of the speakers<br />

representing NCCS.<br />

The afternoon session began with a lunchtime seminar, followed by the medical<br />

symposium for healthcare professionals. Dr T. Agasthian, Senior Consultant from the<br />

Department of Surgical Oncology, spoke on behalf of NCCS.<br />

A wide variety of topics was<br />

covered during the convention:<br />

PUBLIC SEMINAR<br />

• Does altering your eating habits<br />

change the risk of cancer?<br />

• Getting a friend to stop smoking<br />

• New cancer screening techniques<br />

LUNCH SYMPOSIUM<br />

• HPV Vaccination for Cervical <strong>Cancer</strong><br />

Prevention in <strong>Singapore</strong> –<br />

Are we a leader or a lagger?<br />

• <strong>Cancer</strong> vaccines of the Past,<br />

Present and Future<br />

MEDICAL SYMPOSIUM<br />

• Cervival <strong>Cancer</strong>: to vaccinate<br />

or not to vaccinate?<br />

• Screening Lung <strong>Cancer</strong>:<br />

useful or harmful?<br />

• Decision making in cancer<br />

screening in the elderly<br />

• The era of individualising<br />

cancer management


PAGE A6<br />

People<br />

SALUBRIS<br />

July / August 2009<br />

10 YEAR DEVOTION WINS<br />

SISTER CHIEW CHENG FONG<br />

RECOGNITION<br />

“Surprised, but an honour” were her first words when<br />

Sister Chiew Cheng Fong learnt that she was among this<br />

year’s <strong>National</strong> Day Awards recipients.<br />

The <strong>National</strong> Day Awards are a means of recognising<br />

various forms of merit and service to <strong>Singapore</strong>.<br />

For her 30-year-long devotion to nursing, Cheng Fong<br />

has been conferred the Efficiency Medal.<br />

Instituted in 1969, the Efficiency<br />

Medal may be awarded to any of the<br />

following persons for exceptional<br />

efficiency or exceptional devotion to<br />

duty or for work of special significance:<br />

• any public officer;<br />

• any officer employed by any statutory<br />

authority (other than a Town Council);<br />

• any person in the service of any<br />

organisation, association or body<br />

rendering services in the field of<br />

education; or<br />

• any person employed in any company<br />

which is wholly-owned by the<br />

Government and which is carrying<br />

on business mainly as an agent or<br />

instrumentality of the Government.<br />

With her years in nursing, Cheng Fong<br />

has tended to countless patients and<br />

touched the hearts of many. She believes<br />

that a crucial ability of a nurse is<br />

interpersonal interaction with patients.<br />

Creating bonds and forming<br />

relationships with patients enables<br />

her to understand their feelings better<br />

and hence help them soothe their<br />

sufferings through effective ways apart<br />

from medical attention. A model nurse<br />

extends a helping hand or listening ear<br />

to all patients whenever possible.<br />

When asked what challenges nurses<br />

face in today’s society, she said,<br />

“Patients’ expectations are different<br />

now compared to the past. They are<br />

now smarter and more knowledgeable<br />

thanks to the extensive amount of<br />

information available.”<br />

Her advice to patients however is:<br />

“They need to sieve through it as<br />

well as speak to their healthcare<br />

professionals for clarification.”<br />

Yet for someone who has<br />

displayed such enthusiasm<br />

towards an arduous career path,<br />

her reason for taking up nursing<br />

was unexpectedly casual.<br />

“After finishing my ‘A’ Levels, the first job<br />

that I saw in the papers was a nursing<br />

one. Hence, I just applied for it,” came<br />

her straightforward reply. No motivations,<br />

no inspirational stories. Despite the<br />

feeble attachment, she has never looked<br />

back since that day and is now the senior<br />

nurse clinician of the operating theatre /<br />

endoscopy suite at NCCS.<br />

Cheng Fong has been with NCCS since<br />

1999 when the centre first opened its<br />

doors. Recounting the early days, she<br />

cited the establishment of the Ambulatory<br />

Treatment Unit (ATU) as one of her most<br />

memorable experiences.<br />

As the person who commissioned the<br />

ATU and the Operating Theatre (OT), she<br />

had been under intense pressure, but the<br />

outcome was worth all her trouble. “It was<br />

a real challenge. Getting to know people,<br />

equipments and liaising with vendors.”<br />

Come November, she is due to receive her<br />

medal. But nevertheless, she will not let the<br />

recognition swell her ego and will continue<br />

to dutifully offer her services to her patients.<br />

By Joshua Tan


WHERE DID YOUR<br />

FINGERPRINTS GO?<br />

PAGE A7<br />

People<br />

SALUBRIS<br />

July / August 2009<br />

Most of us assume that our fingerprints are<br />

permanent and unique. One can hardly<br />

dispute this, considering that fingerprints<br />

have always been regarded as the most<br />

reliable method of identification.<br />

Hence, the government agencies<br />

would seek your fingerprint if<br />

you want to apply for an identity<br />

card, or a passport. Those who are<br />

illiterate can use their fingerprint to open<br />

a bank account. Not only that, convicted<br />

criminals are fingerprinted so that they can<br />

be tracked down for any future offences.<br />

For most of us, the fingerprint is like our<br />

shadow. It goes with you wherever you are.<br />

But this was not to be for an Indonesian<br />

travelling abroad to visit his relatives.<br />

Mr S (as he chose to remain anonymous)<br />

turned up at a United States airport with<br />

no fingerprints when the border security<br />

checked him to verify his identity.<br />

The 62-year-old was detained for four hours<br />

as he tried to explain his predicament.<br />

Eventually he was released when the<br />

authorities determined that he was not a<br />

security threat.<br />

Where did Mr S’s fingerprints go? His<br />

doctor, Senior Consultant Dr Tan Eng<br />

Huat of the Department of <strong>Medical</strong><br />

Oncology, <strong>National</strong> <strong>Cancer</strong> <strong>Centre</strong><br />

<strong>Singapore</strong>, shed light on this mystery.<br />

For more than three years, Mr S,<br />

who was diagnosed with Metastatic<br />

Nasopharyngeal Carcinoma, has been<br />

on a course of orally-administered<br />

cytotoxic drug Capecitabine. The drug,<br />

also known as Xeloda, is commonly<br />

used for the treatment of metastatic<br />

breast cancer and cancers of the colon,<br />

head and neck and stomach.<br />

The drug spawns some dermatological<br />

damages such as blistering on the<br />

hand and foot in up to 40 per cent of<br />

the patients. More severe side effects<br />

include peeling and bleeding on palms<br />

and soles of feet. Over time, their<br />

fingerprints vanish.<br />

But this does not mean that patients<br />

should refrain from travelling abroad.<br />

Dr Tan has a simple remedy that will<br />

ease some of the inconveniences<br />

they would experience with security<br />

authorities: carry a doctor’s letter on<br />

oneself at all times, especially when<br />

they are travelling.<br />

The spin-off for the whole saga however<br />

saw Dr Tan and his colleague Dr Choo<br />

Su Pin in the centre of a media storm<br />

when the news was reported in the<br />

Annals of Oncology, a monthly journal<br />

published on behalf of the European<br />

Society for <strong>Medical</strong> Oncology.<br />

From Colombia to the UK and<br />

Europe, the world’s news media<br />

hounded the two doctors for a story<br />

for more than a week.<br />

By Carol Ang<br />

PROMOTIONS<br />

NAME<br />

Dr Yap Swee Peng<br />

Dr Lim Soon Thye<br />

Dr Toh Chee Keong<br />

Dr Tham Chee Kian<br />

TITLE<br />

Radiation Oncology, Acting Director,<br />

Public & Patient Education<br />

Deputy Head, <strong>Medical</strong> Oncology<br />

Senior Consultant, <strong>Medical</strong> Oncology<br />

Associate Consultant, <strong>Medical</strong> Oncology


PAGE A8<br />

NCC Foundation RUN FOR HOPE 2009<br />

SALUBRIS<br />

July / August 2009<br />

22nd November, Sunday, East Coast Park, Angsana Green<br />

Run For Hope (RFH) is<br />

an annual charity leisure<br />

run organised by the NCC<br />

Foundation in conjunction<br />

with the Four Seasons<br />

Group (Four Seasons Hotel<br />

and The Regent) in benefit<br />

of the NCC Research Fund.<br />

The press conference for RFH’09 took place<br />

on 25th June at The Regent and was hosted<br />

by the following panel of speakers:<br />

• Prof. Soo Khee Chee, Director, <strong>National</strong> <strong>Cancer</strong><br />

<strong>Centre</strong> <strong>Singapore</strong><br />

• Eugene Sng, Programme Director, NCC<br />

Foundation<br />

• James Lee, Chairman, Run For Hope 2009;<br />

Finance Director, The Regent<br />

• Devin Otto Kimble, Managing Director, Brewerkz<br />

• Ezzy Wang, <strong>Cancer</strong> Survivor, Run For Hope<br />

Champion<br />

For the first time, the microbrewery restaurant<br />

Brewerkz crafted a special “Hope Beer” to help raise<br />

funds for cancer research at NCCS. The malty tasteful<br />

brew was unveiled at the press conference; for every<br />

pint of Hope Beer sold at Brewerkz restaurants in<br />

<strong>Singapore</strong> from June to November, one dollar will go<br />

to the NCC Research Fund.<br />

This year’s event also witnessed another first – the endorsement of Mr Ezzy<br />

Wang as the champion ambassador. Ezzy is a cancer survivor at NCCS; with his<br />

sunshine personality, positive attitude and active lifestyle, Ezzy’s involvement<br />

provides a refreshing and humanistic perspective to Run For Hope.<br />

We look forward to seeing you at the leisure run. Do come with<br />

your family and friends to make a collective statement to fight<br />

cancer with a joyful and hopeful spirit. Please visit our website<br />

for more photos, registrations and donations details:<br />

www.runforhopesingapore.org<br />

Editorial Advisors<br />

Dr Kon Oi Lian<br />

Prof Soo Khee Chee<br />

Executive Editors<br />

Ms Carol Ang<br />

Ms Veronica Lee<br />

Mr Sunny Wee<br />

Contributing Editor<br />

Dr Wong Nan Soon<br />

Members, Editorial Board<br />

Ms Audrey-Anne Oei<br />

Ms Sharon Leow<br />

Ms Flora Yong<br />

<strong>Medical</strong> Editor<br />

Dr Tan Min-Han<br />

Members, <strong>Medical</strong> Editorial Board<br />

Ms Lita Chew<br />

Dr Mohd Farid<br />

Dr Melissa Teo<br />

Dr Teo Tze Hern<br />

Dr Deborah Watkinson<br />

Dr Richard Yeo<br />

is produced with you<br />

SALUBRIS in mind. If there are other<br />

topics related to cancer that you would like to read about<br />

or if you would like to provide some feedback on the<br />

articles covered, please email to salubris@nccs.com.sg.<br />

NATIONAL CANCER CENTRE SINGAPORE<br />

Reg No 199801562Z<br />

11 Hospital Drive <strong>Singapore</strong> 169610<br />

Tel: (65) 6436 8000 Fax: (65) 6225 6283<br />

www.nccs.com.sg

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