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Click 34 year old female affected by external snapping hip. The study was performed using a linear 5-12 MHz probe at the level of the left greater trochanter. Figure 0 to 2 are static images: Figure 0 (``1 greater trochanter long``): longitudinal section of the greater trochanter. Figure 1: axial section of the greater trochanter. Figure 2: the hip is adducted and extended, the myotendinous junction of the gluteus maximus muscle is located in the posterior side of the greater throcanter. Figure 3 to 5 are dynamic images taken during flexion with abduction and external rotation of the hip. They show the progressive anterior dislocation of the myotendinous junction of the gluteus maximus muscle over the greater trochanter (anterior snap). Figure 6 is a static image taken at the end of the movement (adduction and extension) showing the myotendinous junction coming back to the original position.

Click 34 year old female affected by external snapping hip. MRI images of the pelvis. Axial T1-weighted spin echo sequence showing a sickle-shaped myotendinous junction of the gluteus maximus muscle.

Click 34 year old female affected by external snapping hip. MRI images of the pelvis. Axial T2-weighted fat-saturated sequence showing a small area of high signal intensity corresponding to a small edematous area adjacent to the left posterior greater trochanter.

Click 34 year old female affected by external snapping hip. MRI images of the pelvis. Sagittal T2-weighted fat saturation sequence showing a small area of high signal intensity corresponding to a small edematous area adjacent to the left posterior greater trochanter.

Click 34 year old female affected by external snapping hip. MRI images of the pelvis. Coronal T1-weighted spin echo sequence showing a sickle-shaped myotendinous junction of the gluteus maximus muscle and the atrophy and fatty muscle degeneration.