Value of endoscopic submucosal dissection in diagnosing gastric mucosa-associated lymphoid tissue lymphoma: A case report

Figure 1 Endoscopic images prior to endoscopic submucosal dissection. A: Gastroscopy revealed a mucosal rough area measuring 2.5 cm × 3.0 cm in the posterior wall of the antrum; B: Narrow band imaging showed irregular marginal crypt epithelium and subepithelial capillary network.

Figure 2 Endoscopic images during endoscopic submucosal dissection. A and B: The procedure of endoscopic submucosal dissection; C: Surgical resection of gross specimens.

Figure 3 Histopathological analysis and immunohistochemical examination of the resected specimen. A: Surgical resection of gross specimens; B-H: Postoperative histological examination of the resected specimen revealed dysmorphic lymphoid cells infiltrating the mucosa. Immunohistochemical staining showed positivity for cluster of differentiation (CD) 20, CD3, and Bcl-2, but negativity for CD10 (not shown), Bcl-6, and cyclin D1 (not shown). The Ki-67 index was 5%, suggesting low proliferation. CD: Cluster of differentiation.

Figure 4  A follow-up endoscopy after 1 month (white arrow).

Figure 5 Information from this case report organized based on a timeline. ESD: Endoscopic submucosal dissection; MALT: Mucosa-associated lymphoid tissue; NBI: Narrow band imaging.