OCAD

So I got a few answers, I’ll post what most people think: Chondroid lesion of more than 5 cm (here 5.4) in a context of pain (not otherwise explained) with abnormal painful gait should be evaluated by a oncologic surgeon as it could be low grade chondrosarcoma. The subchondral edema in the femoral head could […]

Thanks for the responses from: Rob Lambert: Yes – can be mechanical. As well as getting subchondral cysts, degenerative change in joints with a short thick capsule and limited range of motion may be associated with ganglion cysts arising from the joint capsule that erode bone around the perimeter of the "tight" joint. Classic examples

The answers varied from charcot-gout-amyloid- plexiform NF This is actually a diffuse NF. Chance of malignancy in these tumors is essentially zero. They are mostly of cosmetic-pain issues. Plexiform have possibly increased chance of malignancy- but not these.. See attached histology slide of this tumor- benign fibroneural tissue Here’s an article detailing different types of

64F, fall from the own height a week ago. Fracture of the middle third of the posterior column of the acetabulum, with a gap of up to 1.4 cm, trapping the internal obturator tendon.

Joel, sorry I forgot to post the follow up on that quiz case. It is indeed the anteromedial meniscofemoral ligament, a variant in the knee, as many of you responded (including Drs Hilary, Kyung, Cantarelli, Peduto and Loupatatzis). The key here is to differentiate it from the infra-patellar plica. It can look similar to the