title: [Juxtacortical osteosarcoma of the radius in a child].
abstract: The authors report a rare case of juxtacortical osteosarcoma of the radius in a child. The diagnosis and treatment were delayed because of misleading and wrongly reassuring radiological and histological aspects. The 12-year-old boy was admitted for a tumefaction of the proximal extremity of the right radius noticed after trauma. Physical examination showed a hard and slightly painful swelling. Xrays showed an irregular osseous mass developed from the superior metaphysis of the radius and encircling it. MRI showed a juxtacortical tumor with medullary involvement. A biopsy concluded to a fracture callus. Ten months later, the tumor became painful and homogeneous, regular and well defined on Xrays. A repeat biopsy showed juxtacortical osteosarcoma. Enbloc resection of the tumor was done. After a follow-up of 2 years, the child is alive without recurrence and metastasis and with a satisfactory function of the upper limb.
authors.affiliation: Service d'Orthopédie Infantile, Hôpital d'Enfants de Tunis, Bab Saadoun 1007 Tunis, Tunisie. mahmoud.smida@rns.tn
authors.forename: M
authors.initials: M
authors.lastname: Smida
authors.forename: K
authors.initials: K
authors.lastname: Nigrou
authors.forename: S
authors.initials: S
authors.lastname: Sassi
authors.forename: M
authors.initials: M
authors.lastname: Ben Ghachem
mesh_terms: D001706:Biopsy; D001859:Bone Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D002648:Child; D003937:Diagnosis, Differential; D005596:Fractures, Closed / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D012516:Osteosarcoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery*; D010146:Pain / Q000209:etiology; D011885:Radius Fractures / Q000175:diagnosis* / Q000473:pathology; D016896:Treatment Outcome