PMC7187675_01
Findings on upper GI endoscopy. (A) Erosions in the lower body and major and minor curvature of the stomach. (B) Narrow band imaging revealed abnormal blood vessels (tree-like appearance) tapering to the erosion site
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GIS (Figure 1) revealed multiple erosions in the lower body and major and minor curvature of the stomach.
Pathological findings. (A) Dense proliferation of small to medium-sized lymphocytes is observed in the submucosal layer (haematoxylin and eosin, original magnification x100); (B) High magnification of the tumour (haematoxylin and eosin, original magnification x400); (C-H) Immunohistochemical staining showing positivity for CD3 (C), CD8 (D), Granzyme B (E), TIA-1 (F) and TCRbetaF1 (G), and negativity for TCRCgammaM1 (H) (immunoperoxidase, original magnification x400).
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Biopsy revealed dense proliferation of small-medium-sized lymphocytes with little atypia in the submucosal layer with some lymphoepithelial lesions (Figure 2).