There was localised tenderness, and McMurray’s test was positive. Arthroscopy revealed a 3.6 × 2.6 × 1.5 cm firm pedicular localised pigmented villonodular synovitis originating from the insertion of ...

MRI of the knee revealed a tumor arising from the Hoffa fat pad. The cause was a proliferative disorder of the synovial membrane (pigmented villonodular synovialitis, PVNS). Arthroscopy ...