The piriformis muscle syndrome.
D001416:Back Pain / Q000209:etiology; D002081:Buttocks; D003286:Contracture / Q000150:complications* / Q000628:therapy; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008161:Lumbosacral Region; D008297:Male; D010021:Osteopathic Medicine; D012585:Sciatica / Q000209:etiology; D013577:Syndrome