Lymphoma of the Knee Joint Simulating Patellar Fracture
E. Lebel, M. Itzchaki
Orthopedics Dept., Shaare Zedek Medical Center, Jerusalem
Fracture of the patella is not uncommon after direct anterior knee trauma. However, there are other medical situations that resemble it radiologicaly. We present a patient mistakenly diagnosed as having a patellar fracture who had primary, solitary, malignant B-cell lymphoma of the knee space eroding the lower pole of the patella. We have found no reports of such a lesion in the literature. Another commbenign condition that might erode adjacent bone is chronic synovitis. Our patient was treated withchemo- and radiotherapy and the lesion fully regressed with no evidence of local or systemic recurrence 1.5 years after diagnosis.