The history, clinical findings, and radiological images are consistent with avascular necrosis of the femoral head. Alcoholism is possibly a risk factor in the etiology of the disease. The radiological classification is a Ficat Stage III, Marcus and Enneking Stage III or Steinberg Stage III based on subchondral collapse producing a crescent sign but no deformation of the femoral head. Treatment options include symptomatic care, redirectional osteotomy, vascularized fibular bone grafting, and total hip replacement arthroplasty. None of the options yield predictable or entirely satisfactory outcomes.
Core decompression is contraindicated by the stage of the disease.
An MRI would be an appropriate additional study for confirmation of the diagnosis, to delineate the extent of head involvement, and assesment of the opposite femoral head.