Ultrasound Finding of Ischiofemoral Impingement Syndrome and Novel Treatment With Botulinum Toxin Chemodenervation: A Case Report.

Unlabelled: Ischiofemoral impingement syndrome (IFIS) is a rare and poorly understood condition that leads to deep gluteal pain, groin, and/or medial thigh pain. It has unique diagnostic challenges, with limited nonoperative treatment options. It is caused by the impingement of the quadratus femoris by the lesser trochanter and the ischium.