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Surgical Case Reports
Fig. 1 | Surgical Case Reports

Fig. 1

From: Mixed adenoneuroendocrine carcinoma with loss of HER2 positivity after trastuzumab-based chemotherapy for HER2-positive gastric cancer: a case report

Fig. 1

Gastroscopy findings and pathological examinations of biopsy specimen. a An ulcerative mass measuring 40–50 mm on the greater curvature corpus of the stomach before chemotherapy. b Pathological examination of a biopsy specimen revealed moderately differentiated tubular adenocarcinoma. c Immunohistochemistry staining showed strong HER2 expression (3+)

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