Low-Stage Gastric MALT Lymphoma Causing Life-Threatening Upper Gastrointestinal Bleeding

Gastric mucosa-associated lymphoid tissue (MALT) lymphoma is an uncommon tumor of the stomach that only comprises around 1–6% of all tumors of the stomach. Non-Hodgkin lymphoma more commonly affects the lymph nodes and may spread to the spleen and bone marrow, whereas extranodal non-Hodgkin lymphoma is less common. Primary gastric lymphoma is further divided based on histologic features; one of the types is MALT lymphoma, which is strongly associated with Helicobacter pylori infection. The first sign of the disease is usually mimicking gastritis. However, in the case reported here, the first sign of gastric MALT lymphoma was massive gastrointestinal (GI) bleeding with hemodynamic instability in a 75-year-old male. The patient came to the emergency department and was immediately resuscitated, intubated, and admitted to the intensive care unit. Urgent endoscopy (