PMC9891148_01
Endoscopic image of a gastric lesion 0-IIa with hyperplastic appearance of the mucosa.
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PMC9891148_01_pjg-0030-0079-g01.jpg
F1
Endoscopic examination revealed a 20-mm 0-IIa type lesion in the great curvature of the proximal corpus with a hyperplastic appearance and a dark coloration area in one of the edges (Fig. 1, 2).
Endoscopic image of the lesion with a dark coloration area of 5 mm in one of the edges.
pjg-0030-0079-g02.jpg
PMC9891148_01_pjg-0030-0079-g02.jpg
F2
Endoscopic examination revealed a 20-mm 0-IIa type lesion in the great curvature of the proximal corpus with a hyperplastic appearance and a dark coloration area in one of the edges (Fig. 1, 2).
Gastric body mucosa with normal epithelial cells and a diffuse infiltration of the lamina propria by sheets of malignant neoplastic cells. HE staining, x40.
pjg-0030-0079-g03.jpg
PMC9891148_01_pjg-0030-0079-g03.jpg
F3
Immunohistochemistry showed diffuse positivity for melanocytic markers (PS100, SOX10 and MelanA) and negativity for cytokeratins, DOG-1 and CD45 (Fig. 3, 4).
Diffuse positivity for MelanA and PS100.
pjg-0030-0079-g04.jpg
PMC9891148_01_pjg-0030-0079-g04.jpg
F4
Immunohistochemistry showed diffuse positivity for melanocytic markers (PS100, SOX10 and MelanA) and negativity for cytokeratins, DOG-1 and CD45 (Fig. 3, 4).