OCAD

16 year male. Basketball. Recent minor trauma to the ankle. Unusual minimal periarticular subcortical signal alterations on PDfs and T1. Focal “erosion” in the transition from the cartilaginous zone to the distal femoral metaphysis. Ambient bone marrow edema in this transition zone at lateral superior femur condyle. Minor signal changes retro patellar (Outerbridge 1). Normal […]

thank you all for taking the time to respond unanimity was: it is a *ganglion cyst,* nobody ever saw a vascular malformation inside ACL I did an CE MRangiography, and indeed, the structure inside LIA did not enhance internally, only the linining, which is consistent with a ganglion cyst. The serpigionous part enhances – but

Thank you everyone for your responses. I remember seeing a case like this posted a long time ago on OCAD but could not find it, so thank you for your patience. Most responders agree that the lesion is a post traumatic fibrous band/synechia/blood clot. I have seen this before but never quite as large as

Hi, Claudio, Julio, thank you for the case contributions. I just had a flashback…. Andrew Grainger, Jay Ives and later Hatice Tuba Sanal (2/2019) posted cases on OCAD (attached) with similar but not identical unusual appearances with varying hypothesis what this could represent (bisphosphonates etc.). I never heard back about follow-up on these cases but