Piriformis Muscle Syndrome

**Definition:** A chronic PELVIC PAIN characterized by pain deep in the buttock that may radiate to posterior aspects of the leg. It is caused by the piriformis muscle compressing or irritating the SCIATIC NERVE due to trauma, hypertrophy, inflammation or anatomic variations.

**Tree numbers:** - C10.668.829.500.675.399 - C10.668.829.550.500 - C10.668.829.600.675 - C23.888.592.612.664.675 - C23.888.592.612.944.750

**Synonyms:** - Piriformis syndrome