A Rare Combination of Gastric Mucosa-associated Lymphoid Tissue Lymphoma, Autoimmune Gastritis, Thyroiditis, Hemolysis, and Systemic Lupus Erythematosus

We herein report a case with the rare combination of mucosa-associated lymphoid tissue lymphoma (MALT lymphoma) of the stomach, autoimmune gastritis (AIG), autoimmune thyroiditis, autoimmune hemolytic anemia (AIHA), and systemic lupus erythematosus. A 68-year-old woman was diagnosed with gastric MALT lymphoma associated with Helicobacter pylori (H. pylori) infection and AIG. Complete remission of the MALT lymphoma was achieved by H. pylori eradication and radiotherapy. Three years after the diagnosis of MALT lymphoma, the patient developed AIHA and anti-nuclear and anti-Smith autoantibody-positive lupus serositis, which were successfully managed with prednisolone administration.