Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Sports Medicine - Knee
Abstract number: 25460
CAN PHYSIOTHERAPY MIMICRI KNEE INJURIES IN MRI?
Matthias BREM 1 , Johannes GUSINDE 1 , Philipp SCHLECHTWEG 2 , Janette
PAPASTAIKOUDI 1 , Michael UDER 2 , Friedrich F. HENNIG 1 , Rolf JANKA 2
1 Department of Surgery - Division of Trauma Surgery and Orthopaedic Surgery,
Erlangen (GERMANY), 2 Department of Radiology, Friedrich-Alexander University
Erlangen-Nuremberg, Erlangen (GERMANY)
Background: In patients with medial knee pain MRI findings after extensive
physiotherapy are often of an uncertain validity. Methods and Patients: 9 volunteers
with no significant knee problems were scanned with a SIEMENS MRI (Erlangen,
1,5T Avanto) (pd tse tra, t2 tse tra fs, t2 tse cor fs, standard 8-channel knee coil)
baseline (t1) and received intensive physiotherapy for the treatment of medial knee
pain after injuries of the medial collateral ligament. Two follow up scans were
performed after 1h (t2) and 24h (t3). The images were analysed by an experienced
radiologist with more than 10 years experience in musculoskeletal MRI. For statistics
paired two sample t-tests were applied. We tested the null hypothesis of the mean of
the sample being equal to zero. Results: In t1 no edama was found in t2 a significant
increase and a further rise at t3 was found. The differences between t1 and t2 are
significant (t-statistic is calculated to be equal to 6.822), the differences between t1
and t3 and the differences between t2 and t3 are also significant (t-statistic of 2.195
implies that the null hypothesis is rejected at the 5% confidence interval).
Conclusion: After physiotherapy a significant increase of soft tissue edema can be
found in MRI, which can be misinterpreted as an injury.
481