Incidental Findings of Duodenal-Type Follicular Lymphoma by Endoscopic Screening: A Case Report

Introduction: Follicular Lymphoma (FL) is a B-cell neoplasm arising from the germinal center. Gastrointestinal FL rare case, accounting for less than 4% of all primary lymphoma gastrointestinal tract. Duodenal-type (DTFL) was included in an entity intestinal FL. However, 2017 World Health Organization (WHO) Classification, this specific variant called DTFL. In article, we report case DTFL 56-year-old man which incidentally found during upper endoscopy Case Presentation: : We endoscopy. The endoscopic finding showed small, hypertrophic, or nodular lesion on part two duodenum. Microscopic evaluation duodenal mucosa consists proliferative atypical lymphoid cells arranged follicular architecture. confined to lamina propria. were dominated by monotonous centrocyte-like cells, small-sized, with scant cytoplasm, and cleaved nuclei. There some scattered larger centroblast-like multiple nucleoli. No mantle zone tingible body macrophage found. immunohistochemical positivity CD 20, 10, Bcl-6, Bcl-2 structure. 21 dominantly stained at periphery structure, Ki-67 low. Conclusions: According clinical data, findings, histopathological patient diagnosed