External Snapping Hip Syndrome: Emphasis on the MR Imaging

snapping hip on flexion and extension of the hip during exercise or with the normal activities of daily living (1). Snapping hip syndrome is generally diagnosed by directly listening to the clicking sounds that are generated during the repeated flexion and extension of the hip or by palpating abnormal movement, and tenography (2), sonography and/or MR imaging have occasionally been used. The sonographic findings of the internal and external types of snapping hip syndrome had recently been reported (3-5). In this current study, we described the MR imaging findings of external snapping hip syndrome in 16 patients with 22 snapping hips.