Asymptomatic Ileal Intussusception: A Rare Twist in a Marginal B-cell Lymphoma.

A 75-year-old male patient with a history of type 2 diabetes, hypertension, interstitial pneumonitis, and gastroesophageal reflux disease underwent a screening colonoscopy that revealed a 3-4 cm ulcerated ileal tumor. Subsequent diagnostic evaluations, including endoscopy and contrast-enhanced CT, identified additional findings of chronic atrophic gastritis with Helicobacter pylori and ileocecal intussusception. Histopathological analysis confirmed a marginal zone B-cell lymphoma with CD20+ expression and negative surgical margins following a right hemicolectomy. H. pylori eradication was successful, and the patient remains asymptomatic with no evidence of recurrence. It can present atypically, including intussusception. Early detection and appropriate management are crucial for achieving favorable outcomes.