PMC6537017_01
CT coronal section of the abdomen and pelvis showing a well-defined solid-cystic mass along lesser curvature of the stomach.
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On computed tomography (CT) of the abdomen and pelvis (Figure 1), a 9 cm x 11 cm x 10 cm (anteroposteriorxcraniocaudalxtransverse) well-defined exophytic mixed solid-cystic mass was located along the lesser curvature of the stomach bulging into the superior and inferior recesses of the lesser sac.
Gastroscopy showing mucosal bulge along the lesser curvature.
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Upper gastrointestinal endoscopy showed a mucosal bulge along the lesser curvature of the body of the stomach and proximal antrum (Figure 2).
Surgical specimen shows the stomach with tumour.
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She underwent total gastrectomy with end-to-side esophagojejunal stapled anastomosis and feeding jejunostomy on 07/04/17 (surgical specimen is seen in Figure 3).
Histopathological images. (a) Hematoxylin and eosin (H&E) 200x magnification. Photomicrograph shows diffuse sheets of tumour cells. (b) H&E 400x uniform cells with round nuclei; small nucleoli with scant-to-moderate clear cytoplasm. (c) Immunohistochemistry (IHC) staining for CD99 shows crisp cytoplasmic membrane staining. (d) IHC for FLI-1 shows moderate nuclear staining in the tumour cells.
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Hematoxylin and eosin staining showed characteristic uniform cells with the round nuclei, small nucleoli with scant-to-moderate clear cytoplasm (Figures 4(a) and 4(b)). On immunohistochemistry, the tumour cells were diffusely positive for CD99 (Figure 4(c)). FLI-1 was positive on immunohistochemistry (Figure 4(d)).