title: Ewing's sarcoma of proximal humeral epiphysis.
abstract: Ewing's sarcoma is one of the most common primary bone tumors of childhood. The tumor is almost always metaphyseal or diaphyseal, within long bones. In children, lesions of the epiphysis are often benign, with the most common diagnosis being chondroblastoma. Rarely, 1%-2% of Ewing sarcomas may involve epiphysis. We present a case of Ewing's sarcoma of the proximal humeral epiphysis in a 13-year-old boy. This case adds to previously reported cases of epiphyseal Ewing sarcoma and suggests that the diagnosis should be considered for pediatric epiphyseal lesions.
authors: Department of Pathology, Tabriz University of Medical Sciences, Tabriz, Iran. dr_niknejadrad@yahoo.com.
authors: Heydar Ali
authors: HA
authors: Esmaili
authors: Department of Radiology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Mohammad Taghi
authors: MT
authors: Niknejad
authors: Department of Pathology, Tabriz University of Medical Sciences, Tabriz, Iran.
authors: Shiva
authors: S
authors: Mohajeri
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms / Q000175:diagnosis*; D002804:Chondroblastoma / Q000175:diagnosis*; D004838:Epiphyses / Q000473:pathology; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D011877:Radionuclide Imaging; D012512:Sarcoma, Ewing / Q000175:diagnosis* / Q000473:pathology*