title: Fibrodysplasia ossificans progressiva presenting acutely as a submandibular swelling.
mesh_terms: D000293:Adolescent; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging; D005528:Foot / Q000000981:diagnostic imaging; D006801:Humans; D008334:Mandible; D009221:Myositis Ossificans / Q000000981:diagnostic imaging*; D012782:Shoulder / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed