Ileocecal CD5-Positive Diffuse Large B-Cell Lymphoma Presenting with Acute Obstructive Symptoms: A Case Report

INTRODUCTION: Primary gastrointestinal lymphoma is a rare form of extranodal non-Hodgkin lymphoma, accounting for approximately 1%–4% of all gastrointestinal malignancies. Among primary gastrointestinal lymphomas, involvement of the small intestine accounts for approximately 20%–30% of cases. CD5-positive diffuse large B-cell lymphoma (DLBCL) is a rare variant, representing approximately 5%–10% of all DLBCL cases and is associated with advanced age, extranodal involvement, and poorer prognosis. We report a rare case of ileocecal CD5-positive DLBCL presenting with acute obstructive symptoms.