Neuropathy secondary to pigmented villonodular synovitis of the hip.

Pigmented villonodular synovitisis a benign proliferative process of unknown origin that may cause extensive bone and joint destruction. Patients with this condition typically presentwith symptoms of mild discomfort and associated stiffness of the involved joint ; however, the spectrum of presentationsis broad. Although pigmented villonodular synovitisbegins in, and usually is confined within, a synovium-lined joint, it may extend beyond the joint capsuleand presentas a soft tissue mass. Three cases of a previously unrecognized presentationof pigmented villonodular synovitisof the hip joint are presented. The authors believe these to be the first reported cases in the English language literature of pigmented villonodular synovitisof the hip seen with femoral or sciatic neuropathy.