<prompt> Basic pathology in myositis ossificans progressiva is in?Muscle fibresSerum chemistryBody collagenNone of the above  <response>: Moality in fibrodysplasia ossificans progressiva myositis ossificans progressiva is usually related to restrictive lung disease caused by an inability of chest to expand. Ref: Harrison 17e, Page 2416; Tachdjians Pediatric Ohopedics 3e, Page 1632-38; watson Jones 6e, Page 63. 