Incidental sonographic detection of mucosa-associated lymphoid tissue lymphoma of the urinary bladder found in a very young woman: report of a case.

We report a rare case of a mucosa-associated lymphoid tissue (MALT)-type lymphoma of the bladder, incidentally found on sonography in a 17-year-old girl during the workup of arterial hypertension. The diagnosis was established by a transurethral biopsy. Treatment consisted of transurethral resection of the bladder tumor and subsequent chemotherapy. To the best of our knowledge, this is the youngest patient with asymptomatic MALT-type lymphoma of the urinary bladder.