TUR生検により診断された膀胱原発mucosa-associated lymphoid tissue（MALT）リンパ腫

A case of primary mucosa-associated lymphoid tissue（MALT）lymphoma of the urinary bladder diagnosed by TUR-biopsy

　症例は64歳，女性。近医CTで膀胱三角部から子宮にかけて腫瘤を認め，当院へ紹介。TUR生検を行い，病理診断はMucosa-associated lymphoid tissue（MALT）リンパ腫であった。MRI，FDG-PETで骨盤内リンパ節転移を認め，膀胱原発MALTリンパ腫，臨床病期ⅡEBと診断。リツキシマブ併用CHOP療法を3コース施行後，膀胱部へ放射線治療（41.6Gy）を行いCRが得られた。

　A 64-year-old woman was referred to our hospital for bladder mass. Computed tomography demonstrated a solid mass on the trigone of bladder presumably extending to the uterus. Transurethral resection of bladder tumor disclosed mucosa-associated lymphoid tissue（MALT）lymphoma histologicaly. MRI and ¹⁸F-fluorodeoxyglucose-positron emission tomography showed metastatic pelvic lymphnode. Diagnosis of primary MALT lymphoma of the urinary bladder,stage ⅡEB was made. We gave rituximab in combination with CHOP chemotherapy by 3 cycles and radiation therapy（41.6 Gy）to urinary bladder. She became in complete remission and has been alive for 29 months with no evidence of recurrence.