Presentation
Painful swelling of the proximal anteromedial aspect of the left lower leg.
Patient Data
soft tissue mass with irregular margins of the proximal anteromedial aspect of the lower leg with isosignal to the muscles on T1, slightly high signal on T2 and STIR and vivid homogeneous enhancement on postcontrast sequences
deep subcutaneous location centered on the deep fascia, adjacent to the pes anserinus, patellar tendon the medial head of the gastrocnemius muscle and the adjacent great saphenous vein
normal thickness and signal intensity of the adjacent tibial cortex with homogeneous bone marrow.
extensive varices throughout the medial thigh
Case Discussion
MRI features of a soft tissue tumor of the anteromedial aspect of the upper leg centered on the deep fascia (desmoid tumor vs soft tissue sarcoma).
The patient went on to have surgical resection of the tumor with a histopathological exam and immunochemistry study that confirmed the diagnosis of a desmoid tumor.