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.

Keywords

parachordoma myoepithelioma stomach neoplasms immunohistochemistry soft tissue tumors

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