Myositis ossificans

Myositis ossificans progressiva
Fibrodysplasia ossificans progressiva
SpecialtyRheumatology 

Myositis ossificans comprises two syndromes characterized by heterotopic ossification (calcification) of muscle. In 2020, the World Health Organization classified myositis ossificans together with fibro-osseous pseudotumor of digits as a single specific entity in the category of fibroblastic and myofibroblastic tumors.