title: Extraskeletal Ewing's sarcoma of the hard palate.
abstract: Extraskeletal Ewing's sarcoma (EES) is a rare soft tissue tumor morphologically indistinguishable from the more common Ewing's sarcoma of bone. We report a case of EES arising in the hard palate of 34-yr-old male patient. Microscopically, the monotonous small round cells without neuronal differentiation showed membranous positive immunoreactivity for MIC2/CD99 and vimentin. Ultrastructurally, the tumor cells showed a few intracytoplasmic organelles without evidence of neurosecretory granules or neurofilaments. The EWS-FLI1 chimeric gene was identified using the nested reverse transcriptase-polymerase chain reaction.
authors.affiliation: Department of Pathology, Pusan Paik Hospital, College of Medicine, Inje University, Busan, Korea. pathkang@inje.ac.kr
authors.forename: Mi Seon
authors.initials: MS
authors.lastname: Kang
authors.forename: Hye Kyoung
authors.initials: HK
authors.lastname: Yoon
authors.forename: Jung Bae
authors.initials: JB
authors.lastname: Choi
authors.forename: Jae Wook
authors.initials: JW
authors.lastname: Eum
mesh_terms: D000071443:12E7 Antigen; D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D015815:Cell Adhesion Molecules / Q000032:analysis; D006801:Humans; D007150:Immunohistochemistry; D008297:Male; D015514:Oncogene Proteins, Fusion / Q000235:genetics; D010157:Palatal Neoplasms / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D021362:Palate, Hard / Q000378:metabolism / Q000473:pathology*; D051789:Proto-Oncogene Protein c-fli-1 / Q000235:genetics; D034802:RNA-Binding Protein EWS; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012512:Sarcoma, Ewing / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D014158:Transcription, Genetic; D014746:Vimentin / Q000032:analysis
chemical_list: D000071443:12E7 Antigen; D015703:Antigens, CD; C061828:CD99 protein, human; D015815:Cell Adhesion Molecules; C106031:EWS-FLI fusion protein; D015514:Oncogene Proteins, Fusion; D051789:Proto-Oncogene Protein c-fli-1; D034802:RNA-Binding Protein EWS; D014746:Vimentin