Case 1, Lower Limb Anomaly or Pathology          (Return to Case List)

This patient is a runner. After one such bout of exercise he experienced pain in the left anteromedial upper thigh. The pain was moderate in walking, occurring at the end of stance phase and the beginning of swing phase. It became more severe when the left leg was lifted up during climbing stairs. It became extreme during the extension of the left thigh that occurs when rising from a seated position, even if no active effort was made to produce this extension.

Below are shown two videos. Both are from an MRI set to reveal standing fluid as bright white. On the left are axial sections with the iliacus (i) and psoas major (pm) labelled in sections 1 and 2. On the right are coronal sections with the iliacus (i) and psoas major (pm) labelled in sections 14 - 21. Play the videos frame by frame, paying particular attention to structures indicated by the green and red arrows. The blue arrows point to the same structure on the right side as do the red arrows on the left. The diagnosis is presented in the box below the images.