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