Fibrodysplasia ossificans progressiva (FOP) is a rare autosomal dominant disease, related to the ACVR1/ALK2 gene mutation that activates the aberrant formation of bone tissue. It is characterized by a gradual limitation of the range of joint movement due to the heterotopic osteogenesis in the connective tissue. As the disease progresses, difficulty in global mobility increases, restricting the expandability of ...