Case summaries taken from the monthly Orthopedic Oncology - Radiology - Pathology Multidisciplinary Conference at the University of Massachusetts Medical School

A 14 year old girl complained of a vague aching pain in her knee for two months.   Exam showed a firm, slightly tender mass palpable on the surface of the posterior femur in the lateral popliteal fossa and no other findings. She had no night pain, no definite benefit from aspirin, no history of injury and was otherwise in excellent health.  Radiographs, a CT with refomatted images, and  images from the MRI are shown at right. Laboratory exams were unremarkable.

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