title: Fibrodysplasia ossificans progressiva presenting as fibrous scalp nodules.
mesh_terms: D003937:Diagnosis, Differential; D005350:Fibroma / Q000151:congenital* / Q000175:diagnosis; D006801:Humans; D007223:Infant; D008297:Male; D009221:Myositis Ossificans / Q000175:diagnosis* / Q000473:pathology; D012535:Scalp; D012878:Skin Neoplasms / Q000151:congenital* / Q000175:diagnosis