膀胱炎症性偽腫瘍の1例

A CASE REPORT OF INFLAMMATORY PSEUDOTUMOR OF THE URINATY BLADDER

　21歳，女性。排尿時痛を主訴として近医より約2か月間に及ぶ抗生剤の投与を受けていたが症状改善せず。腹部超音波検査および膀胱鏡検査にて膀胱腫瘍の疑いで当院受診。腫瘤が膀胱前壁に存在していたため経腹壁的生検施行し膀胱炎症性偽腫瘍の診断を得た。TURおよびステロイド剤投与にて腫瘤が完全に消退しないため膀胱部分切除術を施行した。不必要な拡大手術を避けるために本症の存在を念頭に入れるべきである。

A 21-year-old woman presented with a 2-month history of miction pain, urinary frequency and lower abdominal pain despite of symptomatic treatment by another hospi-tal. Cystoscopic examination and MRI revealed a 3.8×2 cm wide-based tumor located at the right anterior-dome of the bladder. Transabdominal biopsy was performed and the tumor was diagnosed as inflammatory pseudotumor of the urinary bladder. Since the lesion was not completely removed by transurethral resection and administration of prednisolone, partial cystectomy was performed. Awareness of this unusual lesion is important to prevent unnecessary surgical procedures.