Pelvic deformity secondary to tensor fascia lata tightness associated with desmoid tumor.

Summary

The authors present a rare case of a hip contracture in a 28-year-old active man who presented with a functionally disabling hip flexion contracture of 20° with further flexion possible up to 130°, a 45° abduction contracture, and a 20° external rotation contracture with further rotation possible up to 40° with a bony hard swelling in the left gluteal region. Opposite hip and spine examinations were normal. The goals of treatment were to establish the causality between the 2 and to diagnose the etiology of the gluteal mass. Radiographs were normal, with only a pelvic obliquity evident. Magnetic resonance imaging revealed an extra-articular mass abutting the iliac blade. Histopathology confirmed the mass to be a desmoid tumor in the left gluteal region. A wide surgical excision of the mass was performed with negative margins; no postoperative radiotherapy was administered. After rigorous physiotherapy, the hip deformity disappeared at 6 months and there was no evidence of recurrence at 2.5-year follow-up, with the patient able to sit cross-legged and squat.