Initial experiences with a new MRI scoring system for differentiating advanced femoral osteonecrosis from tubercular arthritis.

The purpose of this study was to formulate a magnetic resonance imaging-based scoring system for differentiating tuberculous arthritis from advanced osteonecrosis of the femoral head. Magnetic resonance imaging findings in 18 hips with tuberculous arthritis and 36 hips with advanced osteonecrosis of the femoral head were reviewed retrospectively. Confirmation of tuberculous arthritis was based on enzyme-linked immunosorbent assay and/or synovial biopsy.