Primary lymphoma of the urinary bladder is rare and comprises about 2% of all extranodal lymphomas. We here aimed to report a fifty six yearold man with complaints of dysuria, pollakuria having a primary urinary bladder lymphoma of mucosa-associated lymphoid tissue (MALT) type. Its differential diagnosis with severe chronic cystitis and other lymphoma types is important and may cause diagnostic problems. Immunohistochemistry is important in these cases.
Keywords: MALT lymphoma, primary urinary bladder lymphoma, extranodal marginal zone lymphoma