There are many causes of pterygoid scapula, which can be divided into primary, secondary and autonomic. Primary pterygoid scapula A. Neurogenic O long thoracic nerve-anterior serratus palsy (Figure 1) Ⅱ paracervical nerve-rhomboid palsy (Figure 2) Ⅲ dorsal scapular nerve-rhomboid palsy B. Bony O osteochondroma (Figure 3) Ⅱ fracture deformity healing C. Soft tissue O muscle dystrophy (Figure 4) or muscle Avulsion Ⅱ Scapular thoracic wall bursitis 2. Secondary pterygoid scapula Mostly related to glenohumeral joint pathology, which will resolve on its own when the glenohumeral joint pathology becomes to effective treatment. 3.Self-controlled pterygoid scapula is rare and may be related to mental factors