[Phenotypic Change in a Gastric GIST after NAC‒Imatinib-A Case Report]
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The patient was a 53‒year‒old man who presented to our hospital for evaluation of epigastric pain. Gastroscopy revealed a submucosal tumor with delle. Biopsy specimens showed spindle cell proliferation in a palisading pattern, and immunohistochemical stainin... ...