title: Parachordoma of the gastric serosa: report of a myxoid mimicry in an unusual location.
abstract: The authors report a case of an incidentally discovered myxoid stromal tumor occurring in the outer wall of the stomach of a 65-year-old woman. The tumor was phenotypically consistent with parachordoma (or myoepithelioma), showing a chordoid microscopic appearance of tumor cells loosely arranged within a myxoid or hyaline background. Immunoreactivity for high-molecular-weight keratins, S100 protein, and vimentin was detected. In this report, the authors address the differential diagnosis of parachordoma and the unusual location of this neoplasm.
authors.affiliation: Department of General Surgery, University of Trieste School of Medicine, Trieste, and Department of Pathology and Laboratory Medicine, General Hospital S Maria della Misericordia, Udine, Italy.
authors.forename: Arrigo
authors.initials: A
authors.lastname: Spivach
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Zanconati
authors.forename: Roberto
authors.initials: R
authors.lastname: Tirabosco
authors.forename: Giovanni
authors.initials: G
authors.lastname: Falconieri
mesh_terms: D000368:Aged; D003937:Diagnosis, Differential; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D009208:Myoepithelioma / Q000175:diagnosis* / Q000473:pathology; D009418:S100 Proteins / Q000235:genetics / Q000378:metabolism; D012704:Serous Membrane / Q000473:pathology*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis / Q000473:pathology; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology; D014746:Vimentin / Q000235:genetics / Q000378:metabolism
chemical_list: D009418:S100 Proteins; D014746:Vimentin