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Winter 2013 - Sydney Adventist Hospital

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Hip Replacement in the<br />

Younger Patient<br />

Dr Hagop Kiyork<br />

Dr HAGOP KIYORK<br />

MBBS(UNSW), FRACS (Orth), FAOA<br />

Dr Kiyork has a particular interest in surgery of the knee and<br />

hip providing joint replacement and arthroscopic surgery.<br />

Dr Kiyork practices at <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong> and Hornsby<br />

Public <strong>Hospital</strong>. P: 9979 1273 E: orthosurgery@bigpond.com<br />

W: www.orthosurgery.com.au<br />

The demand for primary total hip replacement<br />

(THR) has steadily grown with the data from the<br />

Australian Orthopaedic Association National<br />

Joint Replacement Registry (AOANJRR)<br />

confirming this trend. The number of hip<br />

replacements (primary partial, primary total and<br />

revision hip replacement) in 2011 was 39.2%<br />

higher than in 2003. 1<br />

Over the decades, THR has proved in the<br />

majority of instances to be a highly successful<br />

procedure. Many recipients attest to this fact.<br />

With an ageing population, the demand will<br />

only rise.<br />

In the early days of joint replacement surgery,<br />

THR was offered mainly to elderly, so called,<br />

low demand patients. The younger patient with<br />

an arthritic hip, or perhaps osteonecrosis, was<br />

counselled to live with their symptoms until they<br />

were “old enough” or in some cases offered<br />

an arthrodesis, a procedure now seldom seen.<br />

However, there are younger patients, under<br />

60 and some under 55 who have disabling<br />

disease of the hip joint with a desire and realistic<br />

expectations of returning to high functional levels<br />

with a THR.<br />

Many conditions can predispose the patient<br />

to early onset hip disease. These include<br />

developmental dysplasia of the hip (DDH),<br />

a history of Perthe’s disease, trauma and<br />

osteonecrosis. This is in addition to idiopathic<br />

osteoarthritis and rheumatoid disease.<br />

This group’s expectations of life differ from<br />

previous generations, and continuing with an<br />

active lifestyle is very important to many in<br />

this demographic. THR in this age group has<br />

been shown to be a successful procedure with<br />

excellent quality of life outcomes.<br />

The issue of patient age and THR is largely,<br />

but not solely, centred on the potential need<br />

for revision surgery in the ensuing years.<br />

An elderly low demand patient will likely be<br />

served for the rest of their life with a single<br />

primary THR. A young patient however (


SAN DOCTOR WINTER <strong>2013</strong><br />

CANCER GENETICS<br />

Dr HILDA HIGH BSc, MBBS (Hons), MCH, FRACP<br />

Dr Hilda High<br />

Dr High is a registered medical oncologist specialising in cancer genetics. She works at<br />

<strong>Sydney</strong> Cancer Genetics at the San Clinic having spent two years working in hereditary<br />

cancer services at the Prince of Wales, Westmead and Royal North Shore <strong>Hospital</strong>s. Dr<br />

High is the recipient of the UNSW Master of Community Health Prize after undertaking her Master in Community Health.<br />

A key member of the Cancer Institute’s eviQ group Dr High has worked with national experts to provide standardised<br />

Australian guidelines for the testing and management of inherited disorders associated with cancer.<br />

P: 9473 8833 W: www.<strong>Sydney</strong>CancerGenetics.com.au.<br />

Outline<br />

The area of cancer genetics is expanding<br />

rapidly. This article clarifies the difference<br />

between somatic and germline mutations.<br />

It also discusses genetic assessment and<br />

testing, using the Breast and Ovarian<br />

Cancer syndrome (associated with BRCA1<br />

and BRCA2 mutations) as an example.<br />

Cancer and Genetics<br />

All cancer is a genetic disease. It is<br />

caused by mistakes (mutations) in key<br />

genes involved in apoptosis, cell cycle<br />

progression, growth, differentiation and<br />

adhesion. These somatic (acquired)<br />

mutations are usually random. They<br />

occur when a dividing cell makes an error<br />

copying its DNA and they accumulate<br />

over time. Hence most cancer occurs at<br />

an older age (e.g. breast cancer occurs<br />

at an average age of 60) and is why<br />

mammographic screening programs start<br />

at 50.<br />

Knowing what somatic mutations are<br />

present in a particular tumour is important<br />

for Oncologists. It is possible to block the<br />

effect of a mutation that is driving cancer<br />

growth with a targeted therapy. A well<br />

known example is treating a breast cancer<br />

with HER2 over-expression with a HER2<br />

blocking agent such as Herceptin.<br />

Somatic mutations, while important, are<br />

not heritable. For example, the mutations<br />

that have turned a breast cell into a breast<br />

cancer have occurred in the DNA of the<br />

breast cell only. (See Figure 1). These<br />

mutations are not present in the germ cells<br />

and so cannot be passed on to offspring.<br />

Figure 1.<br />

Inherited Cancer syndromes<br />

Cancer syndromes are caused by inherited<br />

mutations in tumour suppressor genes<br />

(including DNA repair genes such as<br />

BRCA1 and BRCA2) and oncogenes. Most<br />

are autosomal dominant, in that only one<br />

faulty copy is required, either from paternal<br />

germ cells (sperm) or maternal (ovum). (See<br />

Figure 2).<br />

Figure 2.<br />

These inherited mutations are rare. They<br />

are responsible for only 2 to 10% of<br />

all cancer. However, for the individual<br />

carrying the mutation, the risk of certain<br />

cancers can be significantly increased. For<br />

example, while the average lifetime risk<br />

of breast cancer for an Australian woman<br />

is around 10%, for an Australian woman<br />

with a BRCA1 or BRCA2 mutation it is 50<br />

to 60%. For ovarian cancer the risk jumps<br />

from 1% to between 20 and 40%. 1 While<br />

these are significant increases (i.e. the<br />

“penetrance” of these syndrome is high),<br />

not every individual who carries a BRCA1<br />

or BRCA2 mutation will get cancer.<br />

Who to refer to Hereditary Cancer<br />

Services<br />

Genetic Oncologists and Hereditary<br />

Cancer Services provide specialised<br />

medical services to individuals and families<br />

affected by cancer. These services include<br />

risk assessment, genetic counselling and<br />

testing, cancer risk management and<br />

family planning information. But how to<br />

know who to refer<br />

Taking a detailed family history in a busy<br />

GP or specialist practice is not feasible.<br />

However, even brief questioning about the<br />

family history of cancer (remembering to<br />

include the paternal side) can be revealing.<br />

A rule of thumb is to refer if there are 3<br />

blood relatives with cancer, covering<br />

2 generations where ≥1 relative<br />

was diagnosed


Acute Lumbar Disc<br />

Herniation/Sciatica<br />

Dr Randolph J Gray<br />

Dr Randolph J Gray MBBS(Hons), FRACS(Orth), FAorthA<br />

Dr Gray is a fellowship trained Spinal Surgeon. He undertook training in adult and<br />

paediatric spinal surgery in Toronto, Canada. His scope of practice includes paediatric and adult spinal disorders including<br />

surgical management of paediatric scoliosis, adult degenerative and deformity, spinal trauma and tumour surgery. Dr Gray<br />

also has a special interest in minimally invasive spinal surgery (MISS). Dr Gray operates at <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong>, Royal<br />

North Shore, Westmead Childrens’ and Westmead Teaching <strong>Hospital</strong>s. P: 1300 859 500<br />

E: admin@sydneyspinespecialists.com.au W: sydneyspinespecialists.com.au<br />

Is a vegetarian diet adequate<br />

Meeting the Nutrient Reference<br />

Values on a Vegetarian Diet<br />

Carol Zeuschner<br />

CAROL ZEUSCHNER B.Ed(Sc), MAppSc(Clin Chem), PhD(Pharm)<br />

Carol Zeuschner is the Assistant Director of Corporate Services Hotel Services at the San with her role overseeing the<br />

Nutrition & Dietetics, Food Service and <strong>Hospital</strong>ity Departments. Commencing her career at the San as a Clinical Dietitian<br />

and later as Dietetics Manager, Carol has an active interest in enhancing nutritional care in hospitals. Carol has co-authored<br />

a number of review papers on vegetarian nutrition. P: 9487 9570 E: zeuschner@sah.org.au<br />

SAN DOCTOR WINTER <strong>2013</strong><br />

introduction<br />

Lumbar radiculopathy also commonly<br />

known as sciatica is a very distressing<br />

symptom. Although the aetiology changes<br />

with age the presentation can be very<br />

similar. The commonest age of presentation<br />

is 45-64 years. 1 The distribution of the<br />

follows a dermatomal pattern, which if<br />

mapped accurately allows one to make<br />

an very accurate clinical diagnosis of the<br />

compressed and irritated nerve root. (See<br />

figure 1).<br />

Lifetime prevalence of lumbar radiculopathy<br />

is reported to be 5.3% in men and 3.7%<br />

in women. 2,3 Natural history studies have<br />

shown that lumbar radiculopathy due to<br />

acute prolapsed discs resolve spontaneously<br />

in 23-48% of patients. Up to 30% will have<br />

pronounced symptoms after one year, 20%<br />

will be out of work and 5-15% will undergo<br />

surgical intervention. 4-6<br />

Figure 1.<br />

Assessment<br />

It is important to accurately map the<br />

distribution of the pain. Using this<br />

diagrammatic representation of the pain it is<br />

often possible to make a accurate diagnosis<br />

of the level of pathology.<br />

Segmental Innervation of Lower<br />

Limb Muscles<br />

L3± Knee extensors (quadriceps)<br />

L4± Ankle dorsi exors (tibialis anterior)<br />

L5±Long toe extensors (extensor hallucis<br />

longus)<br />

Observed Power<br />

Total paralysis 0<br />

Palpable or visible contraction 1<br />

Active movement, full range of motion (ROM), with gravity eliminated 2<br />

Active movement, full ROM against gravity 3<br />

Active movement, full ROM against moderate resistance 4<br />

(Normal) active movement, full ROM against full resistance 5<br />

Not testable<br />

Table 1. MRC Grading and Myotomal Innervation<br />

S1± Ankle plantar exors<br />

(gastrocnemius, soleus)<br />

A detail history of bladder and bowel habits<br />

is very important as it could be the only sign<br />

of cauda equina syndrome.<br />

A comprehensive neurological assessment is<br />

imperative. This should include a assessment<br />

myotomal power based on MRC grading<br />

(Table 1), sensation, reflexes and long tract<br />

signs. Specific tests for nerve root irritation<br />

(ie tension signs) such as a straight leg<br />

raise (SLR) and a cross leg SLR is useful in<br />

assessing the degree of nerve root irritation.<br />

Patients presenting with sciatica associated<br />

with an acute neurological deficit or<br />

bladder and bowel disturbance (ie sphincter<br />

dysfunction) are best referred to and treated<br />

in the setting of an emergency department<br />

of a hospital providing an acute spinal<br />

service. 8<br />

Investigation<br />

The investigation of choice for a patient<br />

presenting with a acute neurological<br />

symptom would be an MRI scan. A erect<br />

spinal radiograph is an useful adjunct to<br />

exclude spinal instability/deformity and for<br />

assessments of the alignment of the lumbar<br />

spine. Some of. These subtle changes may<br />

be masked on the non weight bearing<br />

supine MRI scan of the lumbar spine.<br />

Management<br />

In the absence of a neurological deficit or<br />

evidence of a cauda equina syndrome the<br />

management of lumbar ridiculous thy is<br />

essentially patient driven. The known natural<br />

history of lumbar radiculopathy would<br />

MRC<br />

Grading<br />

NT<br />

tell us that in most patients the symptoms<br />

would resolve in time. 6 Symptomatic<br />

management in the initial stage is achieved<br />

by rest, NSAID’s medication, flexion based<br />

core exercises if symptoms allow. If these<br />

measures do not relieve the pain satisfactorily<br />

then a CT guided peri neural injection<br />

of corticosteroids can be considered9.<br />

However he efficacy of this has been<br />

questioned by some researches especially<br />

corticosteroids delivered to the epidural<br />

space. 10 My anecdotal experience echoes<br />

most of the studies that are supportive of<br />

CT guided trans foraminal injections as an<br />

excellent intervention for acute sciatica. 11-14<br />

Surgical intervention is reserved for those<br />

whose pain does not improve satisfactorily<br />

in a reasonable time frame. As to how long<br />

a reasonable time frame is very variable.<br />

It depends on the response to conservative<br />

measures, severity of the residual symptoms,<br />

patients need to get back to normalcy, his or<br />

her tolerance to pain, and the aetiology of<br />

the radiculopathy. It is always important to<br />

counsel the patients that in a far majority of<br />

patients acute onset radiculopathy symptoms<br />

would settle with symptomatic treatment.<br />

Studies have shown that in the short term<br />

early surgery provides faster recovery<br />

and likely to be cost effective compared<br />

to prolonged conservative care. 15,16 Long<br />

term follow up studies have failed to show<br />

a clinical difference at 1 and 2 years in<br />

the early surgery vs prolonged conservative<br />

care groups. 5,16<br />

Cauda Equina Syndrome (CES)may present<br />

in varying combinations of lower extremity<br />

weakness, sensory loss in the lower<br />

extremities and/or saddle area, pain in the<br />

Continues on next page colour panel<br />

A vegetarian population in the US have<br />

been identified as one of the Blue Zone 1<br />

communities known for their unique health<br />

advantages, particularly longevity, and is<br />

also well known for the <strong>Adventist</strong> Health<br />

Studies (AHS) 2 on vegetarian diets. Yet<br />

scepticism remains about the nutritional<br />

adequacy of vegetarian diets for all age<br />

groups.<br />

An Australian first scientific literature review<br />

of vegetarian diets was recently conducted<br />

by a group of accredited practising dietitians,<br />

clinicians and academics with expertise in<br />

plant-based nutrition. Three staff from the<br />

<strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong> were involved<br />

in the development of the series which was<br />

published in June 2012 as a supplement<br />

to the Medical Journal of Australia. It<br />

addressed key nutrients of interest including<br />

protein, iron, zinc, omega-3 and vitamin<br />

B12 in vegetarian diets. The supplement<br />

presents a balanced view of common myths,<br />

questions and misconceptions surrounding<br />

the adequacy of plant-based eating patterns.<br />

It also included a research paper referencing<br />

practical meal plans on how vegetarian diets<br />

meet the Nutrient Reference Values. 3<br />

Australia’s National Health and Medical<br />

Research Council (NHMRC) and the New<br />

Zealand Ministry of Health set the Nutrient<br />

Reference Values (NRV) as recommended<br />

target levels for all nutrients, in the form<br />

of Recommended Dietary Intake (RDI) or<br />

Adequate Intakes (AIs). Since the release<br />

in 2006 there has been some concern<br />

expressed about the ability to meet these<br />

recommendations. Compared with the 1991<br />

RDIs, the 2006 NRVs recommend a small<br />

increase in iron for men, women and pregnant<br />

women and an increase in zinc for men.<br />

For vegetarians, the further recommended<br />

increases in iron requirement (80% higher<br />

than current RDIs for non-vegetarians) and<br />

zinc requirement (50% higher than current<br />

RDIs for non-vegetarians) present additional<br />

challenges. The higher iron requirement<br />

is based on the assumption that only 10%<br />

of iron is absorbed from a vegetarian diet,<br />

compared with 18% from a mixed diet that<br />

includes meat. The higher zinc requirement is<br />

based on the fact that vegetarian diets have<br />

a higher phytate content in conjunction with<br />

evidence that the phytate-to-zinc ratio can<br />

affect zinc absorption.<br />

Sample single-day lacto-ovo vegetarian<br />

meal plans were developed to meet the<br />

NRVs including increased requirements<br />

for iron and zinc at 180% RDI and 150%<br />

RDI respectively for vegetarians across all<br />

age and gender groups. This clinical focus<br />

project shows that well planned vegetarian<br />

diets can meet almost all nutritional needs of<br />

children and adults of all ages.<br />

The meal plans met key requirements with<br />

respect to energy; protein; carbohydrate; total<br />

fat; saturated, poly- and monounsaturated<br />

fats; α linolenic acid; fibre; iron; zinc;<br />

calcium; folate; and vitamins A, C, E and<br />

B12.<br />

Vitamin D and long-chain n-3 polyunsaturated<br />

fatty acids (PUFAs) were below requirements,<br />

however these same nutrients are also a<br />

concern for non-vegetarians who have limited<br />

sun exposure and consume minimal amounts<br />

of oily fish. Small amounts of short chain n-3<br />

PUFAs (found in chia seeds, flaxseeds and<br />

walnuts) were included in the meal plans<br />

and provided significant amounts of ALA.<br />

ALA is endogenously converted to long-chain<br />

omega-3 fatty acids, but conversion depends<br />

on age, sex and dietary composition.<br />

The meal plans used minimal amounts of<br />

omega-6 fatty acids (oils and margarines) to<br />

optimise conversion.<br />

The sample meal plan for pregnant women<br />

provided 36.6mg of dietary iron, but fell short<br />

of the 48.6mg NRV for iron in pregnancy for<br />

vegetarians. The iron requirements set by the<br />

NHMRC for pregnant vegetarians exceeds<br />

the safe upper limit and did not account for<br />

the body’s adaptive absorptive mechanism<br />

or dietary enhancers of iron absorption<br />

such as vitamin C. It is common practice<br />

for pregnant women (irrespective of their<br />

dietary preferences) to take iron supplements<br />

during pregnancy or have their iron levels<br />

monitored.<br />

More Australians are now consuming<br />

regular plant-based meals in the belief that<br />

eating less meat and more plant foods<br />

improves overall health. Requirements for<br />

most key nutrients can be met across the life<br />

cycle by well planned plant-based lacto-ovo<br />

vegetarian diets. Furthermore, nutrient-dense<br />

vegetarian diets are more likely to provide<br />

additional health benefits, particularly with<br />

respect to prevention and treatment of many<br />

chronic diseases.<br />

For a more in depth discussion of the results<br />

and full references, please refer to the full<br />

paper at the MJA OPEN website. These meal<br />

plans are available to use as tools in clinical<br />

practice.<br />

References available on request.<br />

ACUTE LUMBER DISC HERNIATION/SCIATICA (Continued from page 4)<br />

low back and/or lower extremities, and visceral impairment of bladder, rectal, and/or<br />

sexual function. Patients suspected with this form of presentation should be referred to<br />

emergency department for further management. 8<br />

Surgical options<br />

Acute lumbar disc herniation (ALDHA)<br />

Far majority of patients in the age group of 45-64 present with this pain secondary to<br />

ALDH. The offending fragments can either be contained or sequestered. Once conservative<br />

measures have been exhausted a microdiscectomy is a reasonable option that would<br />

relieve most of the residual pain. 16,17 This can be performed in a minimally invasive fashion<br />

using paramedian tubular retractors or in the convention open technique through the<br />

midline. Whilst there may be some sort term benefits form the MIS technique for treatment<br />

of postero lateral LDH no long term benefits have Been demonstrated compared to the open<br />

technique. 18,19 A detail discussion of the pro and cons of each approach is beyond the<br />

scope of this article.<br />

References available upon request<br />

4 5<br />

SAN DOCTOR WINTER <strong>2013</strong>


SAN DOCTOR WINTER <strong>2013</strong><br />

DIAGNOSIS AND MANAGE-<br />

MENT OF SUBMANDIBULAR<br />

GLAND CALCULI<br />

Dr James Younessi<br />

Dr James Younessi BSc(Path) BDSc MDSc(OMFS) FDSRCS(Eng) FFDRCS(Ire)<br />

Oral Maxillofacial surgeon Dr James Younessi has a special interest in implant surgery, facial trauma management, wisdom<br />

teeth surgery, and management of benign salivary gland pathology. He operates from the <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong> and his<br />

practice is at Hornsby. Apart from his surgical craft he has a keen interest in literature and is a published author of 4 books.<br />

P: 9987 2666 E: hornsbyomfs@live.com.au W: www.dryounessi.com.au<br />

In Australia, malignant diseases of the<br />

oro-facial region are typically managed by<br />

ENT/Head and Neck surgeons.<br />

Accordingly, in this article only benign<br />

pathology of the salivary glands are<br />

considered, as appropriate to the practice<br />

of oral and maxillo-facial surgery.<br />

The salivary glands exist in two forms:<br />

• Large well encapsulated, but not<br />

necessarily well defined aggregates of<br />

cells and stroma that share a common,<br />

histologically distinct and well defined<br />

duct, viz – parotid and submandibular<br />

glands.<br />

• “Free” un-encapsulated aggregates of<br />

salivary glands known as minor salivary<br />

glands.<br />

This article covers the diagnosis and<br />

management of submandibular gland<br />

salivary calculi – but does not imply other<br />

salivary gland calculi are less important<br />

although parotid calculi are indeed less<br />

frequent.<br />

Salivary stones cause ductal obstruction,<br />

salivary stasis and therefore infection. Why<br />

they occur in the first place remains unclear,<br />

but almost certainly regular dehydration<br />

plays a part. There is, as with calculi<br />

elsewhere in the body, particular cohorts of<br />

patients who are “stone formers”. Patients<br />

with multiple calcifications should be<br />

investigated for a metabolic cause. There<br />

is a statistically significant association with<br />

hypertension and diabetes mellitus.<br />

For the benefit of my patients, I have found<br />

it easier to compare the principles of<br />

sialolithosis in roughly the same form as an<br />

oyster developing a pearl. That is, a foreign<br />

body, perhaps a food particle or pumice<br />

from tooth paste has been lodged in the<br />

salivary duct and the attempt at “warding<br />

off” this insult leads to sialolithosis.<br />

There is an interesting report of a fish bone<br />

as causative of a salivary stone. 1<br />

The potential explanation for a<br />

preponderance of submandibular<br />

Papillary<br />

stone (50%)<br />

Mouth floor stone<br />

Sublingual stone<br />

Extradochal<br />

stone (ulcerated<br />

throught wall)<br />

Figure 1. Site and approximate incidence of salivary calculi<br />

sialadenitis over the parotid or minor<br />

glands may be the more mucous nature<br />

of the saliva. Increased viscidity may<br />

mean more likelihood for stone formation.<br />

Another explanation may be the rather<br />

sharp angle the duct takes as it ascends<br />

from the gland in the neck proper to enter<br />

the mouth. Routine dehydration could lead<br />

to ready stagnation.<br />

In the above context, any person with<br />

xerostomia such as the elderly (gland<br />

involution), Sjogrën’s syndrome sufferers,<br />

diabetes mellitus, or athletes who<br />

insufficiently rehydrate themselves between<br />

bouts of sporting exertion are all at risk.<br />

Intraglandular stone<br />

ANATOMICAL SITES OF SUBMANDIBULAR CALCULI.<br />

The seminal paper by Rose describes<br />

the anatomical sites of submandibular<br />

calculi and as this is immediately relevant<br />

to management, Table 1 2 sets out these<br />

findings:<br />

As is clear from the table, stones of the<br />

ostium and the intra-orally accessible<br />

aspect of the duct account together for<br />

57% of the stones.<br />

No data exists for extra-ductal stones which<br />

are presumably eroded out of the duct. The<br />

author has seen this on only one occasion<br />

but it may have been more in keeping<br />

with earlier efforts by other colleagues at<br />

Duct opening 50% Intra-glandular 16%<br />

Mid third of duct 7% Hilar aspect 27%<br />

Table 1.<br />

Hilar stone<br />

(27%) 7cm<br />

posterior to the<br />

mandibular<br />

incisors in adults<br />

calculus removal. The local anatomy may<br />

well have been therefore perverted.<br />

Hilar and intra-glandular calculi are not<br />

accessible intra-orally and together account<br />

for 43% of the sialolithosis affecting the<br />

submandibular gland.<br />

Diagnosis is generally made clinically with<br />

pain and swelling prompting presentation.<br />

Erythema of ductal opening is not<br />

invariable. Swelling of the salivary glands<br />

and perhaps, particularly with glands<br />

being repeatedly infected, fibrosis is<br />

not uncommon. Accordingly, bi-digital<br />

examination could variably yield a swollen<br />

and painful gland in the neck (sialstasis/<br />

sialadenitis) or a small atrophic gland<br />

(fibrosis). A healthy normal submandibular<br />

gland is about the size of a walnut.<br />

Perhaps the most revealing symptom is<br />

pain and swelling on consumption of food<br />

stuffs, particularly tart foods.<br />

Clinical suspicions are generally easily<br />

confirmed when the calculus is digitally<br />

palpable and in rarer cases visually<br />

obvious. This is most commonly possible<br />

with extravasated (partial) calculi or those<br />

at the very opening of the gland duct.<br />

Clinical findings are appropriately<br />

confirmed by imaging.<br />

Asymptomatic stones have been<br />

incidentally found on otherwise routine<br />

imaging but for the purposes of this article<br />

we are concerned with confirmatory<br />

evidence of clinically suspected stones.<br />

As such a three dimensional localisation<br />

would have to be the most appropriate<br />

modality. Not only will it allow anatomical<br />

localisation and in turn assist in treatment<br />

planning but also should help exclude<br />

concurrent and perhaps more sinister<br />

pathology.<br />

Conventional sialography is probably<br />

outmoded. Cannulation of the duct in<br />

inexpert hands was not only painful<br />

but could also lead to false passages,<br />

infection/sepsis or proximal spread of<br />

the infection. Perhaps the most unpleasant<br />

consequence however was the inadvertent<br />

proximal herniation of a calculus. This<br />

would make an otherwise accessible<br />

calculus difficult to access.<br />

A CT sialogram performed expertly has<br />

perhaps only marginal benefit over a<br />

routine CT scan. Sialectasis, multiple<br />

stones, or additional pathology such as<br />

Sjögren’s syndrome is perhaps better<br />

illustrated. An MRI scan is valuable when<br />

additional pathology such as a tumour is<br />

suspected. Ultrasound is useful in depicting<br />

the gland in the neck but is of lesser value<br />

in 3D identification of the pathology and<br />

intra-oral examination of the duct is not<br />

practical.<br />

MANAGEMENT OF SALIVARY STONES.<br />

Duct:<br />

Gland/Hilum:<br />

Table 2.<br />

Management is dependant upon the<br />

anatomical location of the stone and the<br />

operator’s preference and expertise.<br />

Immediate management centres on<br />

rehydration of the patient, steroids,<br />

analgesia and antibiotics.<br />

Perversely, a tart diet or sucking on a lemon<br />

wedge as has been advocated by some<br />

authorities is inappropriate in the acutely<br />

inflamed and painful gland. Sialogogues,<br />

aperitifs or tart foods would encourage<br />

gland activity and the secretion beyond<br />

the obstructed duct can cause pain.<br />

It is preferable to consume a bland diet<br />

until the gland is less inflamed and/<br />

or the obstruction addressed. Of course<br />

thereafter sialogogues are appropriate<br />

to encourage residual gland activity and<br />

mechanical flushing.<br />

Appropriate antibiotics are those with<br />

cover for oral flora and a combination<br />

of Amoxicillin and Metronidazole is<br />

often quite appropriate. Up to 8mg of<br />

Dexamethasone or equivalent given as a<br />

once only dose is also appropriate.<br />

Definitive management often warrants<br />

surgical intervention and is tabulated in<br />

Table 2 for quick reference.<br />

Please recall that not all ductal obstructions<br />

are calcified and thus they may not be<br />

subject to imaging. Thickened saliva can<br />

often occlude a duct, particularly one with<br />

a smaller lumen, and manifest identically.<br />

Provided the stone is accessible, suction<br />

extraction may be possible. A small ductal<br />

incision may be needed.<br />

More often, though, formal dissection<br />

of the duct and gentle exploration under<br />

good lighting with meticulous haemostasis<br />

is needed. The best recommendation to<br />

assist here is the use of a “stay suture”<br />

proximal to the ductal occlusion, lest the<br />

stone be displaced further away from<br />

the sublingual (accessible) aspect of the<br />

floor of the mouth. Recall ductal dilatation<br />

and salivary pooling would make such a<br />

prospect otherwise perfectly plausible.<br />

The major impediment for ductal calculus<br />

extraction is the rich nearby vasculature<br />

and the lingual nerve as it “double<br />

crosses” the submandibular gland duct<br />

more proximally. Lingual altered sensation<br />

and partial loss of taste (chorda tympani)<br />

is possible. Here, as always informed<br />

consent is essential.<br />

Removal of stone/Meatotomy/Duchoplasty/Lithotripsy<br />

Sialoadenectomy with a cervical approach.<br />

Hilar or intra-glandular stones mandate<br />

a submandibular sialoadenectomy. An<br />

incision is made in the neck proper<br />

some 4cm below the lower border of the<br />

mandible. Keeping the dissection beneath<br />

the platysma muscle gives the operator<br />

the greatest chance of preserving the<br />

marginal mandibular branch of the VII<br />

cranial nerve. The fascia propria of the<br />

submandibular gland is utilised, and care<br />

taken to avoid nicking it. In this way, a<br />

neat bloodless field assists the procedure.<br />

The lingual nerve needs to be identified<br />

and preserved whilst the oral aspect of the<br />

duct tied as far anteriorly as practical. The<br />

clue is often the submandibular ganglion.<br />

Some authorities have suggested oral<br />

cannulation of the duct pre-operatively to<br />

assist intra-operative identification and<br />

in turn preservation of the lingual nerve<br />

which would appear very similar.<br />

A suction drain is usually used for a day or<br />

two, once the wound is repaired.<br />

Shockwave lithotripsy has not seen wide<br />

application in salivary calculi management<br />

and certainly in the early genesis of this<br />

treatment modality, shattering of nearby<br />

teeth was reported.<br />

Sialolithosis is common and the majority<br />

occur in the submandibular system. A<br />

sizeable stone or ductal irritation and<br />

fibrosis from a smaller calculus could<br />

cause complete obstruction and sepsis.<br />

Anteriorly placed ductal stones may be<br />

subject to removal intra-orally but hillar or<br />

intra-glandular stones generally warrant<br />

sialoadenectomy. Perhaps there may<br />

be a role for fibroptically assisted stone<br />

extraction for gland preservation in the<br />

future.<br />

References:<br />

1. Abe K, Higuchi T, Kubo S and Oka M (1990)<br />

Submandibular sialadenitis due to a foreign<br />

body.<br />

British Journal of Oral Maxillofacial Surgery 28:<br />

50-52<br />

2. Rose SS (1954)<br />

A clinical and radiological survey of 192 cases<br />

of recurrent swellings of the salivary glands.<br />

Annals of the Royal College of Surgeons,<br />

England 15: 374-401<br />

SAN DOCTOR WINTER <strong>2013</strong><br />

6 7


NEWLY ACCREDITED<br />

SPECIALISTS<br />

Dr Garrick Don<br />

B.Med.Sci.(Hons I), MBBS (Hons), FRACP<br />

Respiratory & Sleep Medicine,<br />

Bronchoscopy/EBUS<br />

Dr Garrick Don is a Respiratory & Sleep Physician,<br />

who has an interest in servicing the Hills, North<br />

Shore and Central Coast, with practices at <strong>Sydney</strong><br />

<strong>Adventist</strong> <strong>Hospital</strong>, Hornsby and Gosford <strong>Hospital</strong>s. His current<br />

clinical practice covers a wide range of disorders including Airway<br />

Disease (COPD, emphysema, asthma & bronchiectasis), Interstitial<br />

Lung Diseases, Lung Cancer, Tuberculosis and Sleep Medicine with<br />

an additional special interest in bronchoscopy and further advanced<br />

endoscopic sampling techniques, such as EBUS. P: 9477 7867<br />

F: 9477 1278 E: drgarrickdon@gmail.com<br />

Dr Richard L Haddad<br />

B.Med.(Newc) M.S.(Syd)(Urol) FRACS(Urol)<br />

Urological Surgeon, Robotic Uro-Oncology<br />

Dr Richard Haddad has completed dual Fellowships.<br />

He was awarded a grant to complete a Robotic<br />

Uro-Oncology Fellowship at the prestigious McGill<br />

University Health Centre, Montreal Canada. As a result, he intends<br />

to use the robotic platform for major urological surgery. He is an<br />

extensively trained open and laparoscopic urological surgeon. He<br />

has published and holds a Master of Surgery (Urology) from <strong>Sydney</strong><br />

University, in prostate cancer. P: 1300 964 463 E: drrhurol@gmail.com<br />

W: roboticurologysydney.com.au<br />

NEWS FROM<br />

THE SAN<br />

• The <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong> Education Centre will open<br />

in September this year. Providing education and simulated<br />

learning facilities for interprofessional multidisciplinary<br />

clinical training of medical, nursing and allied health<br />

professionals, the $17 million purpose-built Centre of<br />

Excellence will be home to the <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong><br />

Clinical School of The University of <strong>Sydney</strong> (SAHCS) and<br />

Avondale College Faculty of Nursing and Health. By<br />

2016, the Education Centre will deliver 37,208 training<br />

days for healthcare students and professionals.<br />

• Developing such landmark education project like<br />

the Education Centre requires vision, leadership and<br />

collaboration. Dedications of an auditorium seat or<br />

learning space in someone’s honour are welcomed<br />

and can be discussed with Assistant Director of<br />

Medical Services Catherine Murphy on 9487 9400.<br />

See www.sah.org.au for more details.<br />

• The San’s New Multi-deck car park,<br />

which is now open, offers 896 new<br />

places. The total car spots on site will be close to 1900<br />

by the end of the Redevelopment.<br />

• The $181 million Redevelopment is on target to complete<br />

by mid - 2014 and will include an extra 200 beds, a new<br />

Maternity and Women’s Health Unit, up to 12 operating<br />

theatres, an Integrated Cancer Centre and new arrivals<br />

and entrance areas. See www.sah.org.au.<br />

SAH GRAND ROUNDS (ALL GP’S INVITED)<br />

Dr Callum Gilchrist<br />

BMedSc(Hons) MBBS FANZCA<br />

Anaesthetist<br />

Dr Callum Gilchrist’s sub-specialty areas of interest<br />

are anaesthesia for ENT, dental-maxillofacial,<br />

endocrine, and general surgery, in addition to<br />

anaesthesia for interventional neuroradiology.<br />

He practices at <strong>Sydney</strong> <strong>Adventist</strong> <strong>Hospital</strong> and is the Specialised<br />

Study Unit Supervisor for head and neck, ENT, dental<br />

surgery and ECT anaesthesia at Royal North Shore <strong>Hospital</strong><br />

within the ANZCA training program. P: 02 8078 4281<br />

E: drcallumrgilchrist@gadr.com.au W: www.gadr.com.au<br />

July 24<br />

A/Prof Henry Woo Urology<br />

August 19 Dr Auriel Jameson General Medicine<br />

October 15 A/Prof Henry Woo Urology<br />

19 August Professor Sharon Kilbreath Breast cancer and<br />

exercise, lymphoedema management and<br />

prevention of shoulder impairments post<br />

mastectomy.<br />

15 October Professor Sharon Kilbreath<br />

Breast cancer and exercise, lymphoedema<br />

management and prevention of shoulder<br />

impairments post mastectomy.<br />

11 November Professor John Watson Neurology<br />

Grand Rounds are held in the Level 2 Conference Room from<br />

12.30 – 13.30pm. (Light refreshments available from 12.00pm.<br />

Please register on arrival).<br />

SAN DOCTOR WINTER <strong>2013</strong><br />

8<br />

The San’s <strong>Hospital</strong> in the Home (HITH) accepts direct<br />

GP referrals for suitable patients. Ring HITH Director<br />

Dr Suhan Baskar to discuss details of clinical eligibility<br />

and referral pathways.<br />

P: 9487 9111 E: Suhan.baskar@sah.org.au<br />

DIARY DATES<br />

GP CONFERENCES (CPD points available with proof<br />

of attendance)<br />

July 24<br />

August 21<br />

October 17<br />

men’s Health<br />

Emergency Medicine<br />

Oncology<br />

FREE PUBLIC FORUM (everyone welcome)<br />

September 10<br />

Men’s Health<br />

Dates and topics are subject to change. Contact 9487 9871<br />

to register or visit www.sah.org.au for further details.

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