<prompt> The following site is commonly involved in cases of Myositis ossificans:MasseterHyoglossusStylohyoidLateral pterygoid  <response>: Myositis ossificans manifests by masses of fibrous tissue and bone in the interstitial tissues of muscle, leading to atrophy and destruction of associated muscles. Masseter is commonly involved in face and fixation of jaw occurs. The patient becomes transformed into rigid, like a petrified man. 