Case 4: Intra-Capsular Popliteal Fossa Mass

28-years old with knee pain and inability to flex fully

This 28-years old presented with swelling in the popliteal fossa and the inability to flex the knee fully with pain.

Plain radiograph - lateral of the knee

Sagittal PDFS MRI of the knee

Sagittal 3D PDW MRI of the knee

Histopath

What is the most likely diagnosis?

1. Synvovial sarcoma

2. Tenosynovial giant cell tumor

3. Hemangioma

4. Desmoid type fibromatosis

The answer

Last week’s quiz was an aggressive bone forming tumor in the distal femur of an 18-years old. You can see it here.