Avascular necrosis of the femoral head.

The patient was a 51-year-old man who was evaluated by a physical therapist for a chief complaint of right hip pain. The patient was treated with a single bout of nonthrust hip joint mobilizations, but due to the patient's atypical response and long-term use of oral corticosteroid medications, he was referred to his primary care physician. Radiographs and subsequent magnetic resonance imaging revealed findings that were characteristic of avascular necrosis.