Piriformis syndrome is a rare cause of sciatica, which results in low backache due to sciatic nerve compression. This syndrome is associated with abnormalities in the piriformis muscle, which cause sciatic nerve entrapment, like anatomic variations, muscle hypertrophy and inflammation. It can also result from the abnormal course of sciatic nerve itself through normal piriformis muscle. Piriformis syndrome due to pyomyositis of the piriformis muscle is extremely rare and only 23 cases are reported
in literature. Herein, we report one such rare case of a patient, with pyomyositis of piriformis muscle, who presented with piriformis syndrome.
Keywords: : Piriformis pyomyositis; piriformis syndrome; sciatica
Introduction
The piriformis syndrome is an uncommon form of sciatic nerve neuropathy secondary to nerve entrapment.[1] This syndrome is characterised clinically by pain and paraesthesia, in the ipsilateral gluteal region radiating into hip and posterior aspect of thigh, along the site of sciatic nerve innervation (sciatica).[1]