Piriformis syndrome is characterized by painful thigh and sciatica caused by piriformis muscle strain, inflammatory reaction or stimulation and oppressive sciatica.

• 梨状肌综合征是指由于梨状肌损伤或炎性反应，刺激、压迫坐骨神经所引起的一侧臀腿疼痛或坐骨神经放射痛为主的病症。