Primary mucosa-associated lymphoid tissue (MALT) lymphoma of the urinary bladder: case report

Selimović Mirnes, Reljić Daniel, Paić Marin,

General Hospital Šibenik, Department of surgery and urology


Primary extranodal marginal zone lymphoma of mucosa associated lymphoid tissue (MALT type) of the urinary bladder, first described by Kempton et al in 1990, is the most common primary bladder lymphoma and associated with an excellent prognosis. The most common symptoms of MALT lymphoma of the urinary bladder are hematuria, dysuria, urinary frequency, nocturia, and abdominal or back pain. We present 80 year old female with history of frequent urinary infections and back pain. She was admitted to our urology department with microhematuria and left hydronephrosis. Computed tomography (CT) showed solid expansive tumor dimensions of 46x 25mm located on left parasagittal area of the down pole of bladder and dilatation of left ureter with left hydronephrosis. After she was hospitalised, we made transurethral resection of tumor mass in urinary bladder. Histopathological findings constistedof low grade MALT lymphoma. There wasnꞌtfound evidence of lymphoma on CT scan of thorax, abdomen and pelvis, so she was diagnosed with primary MALT-type lymphoma of the urinary bladder. She was successfully treated with rituximab.