Adenocarcinoma In Situ Arising from Brunner’s Gland Treated by Endoscopic Mucosal Resection

Figure 4

Histopathological images. Proliferation of Brunner’s glands is seen in the resected specimen (a: ×2, b: ×20). Gastric foveolar metaplasia is also identified (a: blue square, c: ×10). Atypical cells with pleomorphic macronuclei with dense chromatin forming irregular glandular structure are found in the superficial layer (a: red square, d: ×20). Hematoxylin and eosin staining.

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