Bilateral gluteus medius tendinous foramina containing portions of the superior gluteal neurovascular bundle

Introduction The superior gluteal neurovascular bundle passes between the piriformis muscle and gluteus medius muscle as it moves distally to supply the muscles of the gluteal region. The superior gluteal nerve receives spinal contributions from L4, L5, and S1 while the superior gluteal artery is the terminal branch of the posterior division of the internal iliac artery [1]. Multiple variations of the pathway and origin of this neurovascular bundle have been found in the past [2–6]. None of these previous observations show the bundle passing through tendinous foramina made from the surrounding musculature. This is a previously unreported variation in the superior gluteal neurovascular bundle that has significant clinical relevance.