PMC7328486_01
Endoscopic appearance of a bleeding submucosal lesion (arrow) with
umbilication, located in the gastric antrum.
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EGD showed an actively oozing umbilicated submucosal lesion in the gastric antrum, with a greatest dimension of 10 mm (Figure 1).
Endoscopic ultrasound showing a hypoechoic lesion (as pointed out by the
label:mucosal nodule) arising from the gastric submucosa and extending into
the mucosa.
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EUS demonstrated a 10-mm deep mucosal or superficial submucosal lesion manifesting superficial erosion, with no evidence of invasion into the surrounding structures or deeper layers (Figure 2).
Pathologic examination of the resected gastric polyp showing a superficial
erosion, inflammatory submucosal infiltrate (star), and fibroblastic
proliferation (arrowhead) (hematoxylin and eosin staining; 40x).
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Pathologic examination of the resected specimen revealed superficial erosion with inflammatory submucosal infiltrate and fibroblastic proliferation (Figure 3).
Tumor showing bland spindled cells (arrow), small vessels, and an
eosinophil-rich mixed inflammatory infiltrate (arrowhead) (hematoxylin and
eosin staining; 200x).
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The stroma of the lesion consisted of bland spindled cells, small vessels, and eosinophil-rich mixed inflammatory infiltrates (Figure 4).
Tumor showing inflammatory submucosal infiltrate of eosinophils and
lymphocytes, fibroblastic proliferation, and perivascular onion skinning
(arrow) (hematoxylin and eosin staining; 400x).
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High-power examination showed a perivascular onion-skinning pattern and an inflammatory infiltrate composed of lymphocytes and eosinophils (Figure 5).