title: [Fibromatosis and fibrodysplasia ossificans progressiva. An avoidable diagnostic error].
abstract: BACKGROUND
  Myositis ossificans progressiva is a rare progressive disease of connective tissue and muscle whose early diagnosis, before the lesions become ossified, can be difficult. The congenital malformations that accompany the disease may help in this diagnosis.
  
  
  METHODS
  A 12 year-old boy developed a localized swelling in the right trapezius muscle. Muscle biopsy showed fibromatosis lesions. Surgical excision was incomplete and despite chemotherapy, new lesions appeared periodically in the cervical and dorsal regions where they became ossified. Bilateral hallux valgus was noticed at that time and used to rectify the diagnosis as myositis ossificans progressiva.
  
  
  CONCLUSIONS
  Many children suffering from myositis ossificans progressiva have congenital malformations, most commonly of big toes and thumbs. These anomalies are important for distinguishing myositis ossificans progressiva from other inflammatory diseases of muscle.
authors.affiliation: Institut de Puériculture, CHRU, Strasbourg.
authors.forename: G
authors.initials: G
authors.lastname: Daltroff
authors.forename: P
authors.initials: P
authors.lastname: Lutz
authors.forename: P
authors.initials: P
authors.lastname: Bellocq
authors.forename: D
authors.initials: D
authors.lastname: Christmann
authors.forename: F
authors.initials: F
authors.lastname: Flamant
authors.forename: G
authors.initials: G
authors.lastname: Lenoir
authors.forename: J M
authors.initials: JM
authors.lastname: Clavert
authors.forename: J M
authors.initials: JM
authors.lastname: Lévy
mesh_terms: D002648:Child; D003951:Diagnostic Errors; D005350:Fibroma / Q000175:diagnosis* / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D009135:Muscular Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging; D009221:Myositis Ossificans / Q000175:diagnosis* / Q000000981:diagnostic imaging; D011859:Radiography
vernacular_title: Fibromatose et fibrodysplasie ossifiante progressive. Une erreur diagnostique évitable.