PIRIFORMIS SYNDROME The Piriformis Syndrome Is Overdiagnosed

Damage to the Proximal Sciatic Nerve by Lesions in the Vicinity of the Piriformis Muscle. Lesions of the proximal sciatic nerve in the area of the sciatic notch may occur from endometriosis, tumors, hematomas, fibrosis, aneurysms, false aneurysms, or arteriovenous malformations. Some authors have diagnosed such patients as having PS. Since the piriformis muscle plays no role in these situations, such causes of sciatic neuropathy are best included under the rubric “proximal sciatic neuropathies.”