Figure 2From: Uncommon cause for anterior knee pain - Aggressive aneurysmal bone cyst of the patella Computed tomography of the left knee. CT scan of the left patella showing an osteolytic lesion within the inferior pole of the patella. Note the cortical thinning/breakthrough as a sign for the aggressiveness of the lesion. (a) sagittal, (b) axial sequence.Back to article page