The age range of patients with<unk>  is from 32 to 81 years (mean = 53), with a male predominance. Prevalence is higher in those of Japanese or Asian ancestry (2-3.5%) and rarer in other racial groups (0.16%). Schizophrenia patients in Japan may have as high as 20% incidence.
Ossification of the posterior longitudinal ligament
Ischemia-reperfusion injury of the appendicular musculoskeletal system
Humeral avulsion of the glenohumeral ligament
Protrusio acetabuli
Anterior vertebral body tethering
Discoid meniscus
Fibroma of tendon sheath
Posselt's envelope of motion