From: Bilateral myositis ossificans of the masseter muscle after chemoradiotherapy and critical illness neuropathy- report of a rare entity and review of literature
Fibrodysplasia ossficans progressiva
Symmetric congenital malformations of great toes, ossification of upper extremities and back
Traumatic MO
Circumscript new bone growth within the muscle after injury
Neurogenic MO
Occurs below spinal-cord injury