画像上尿管腫瘍が疑われた炎症性偽腫瘍

Inflammatory pseudotumor of the ureter：A case report

症例は75歳，男性で，左下腹部痛を認め近医を受診した。疼痛が続くため当院を受診，左尿管結石疑いにて入院した。X線像では明らかな結石陰影は認めず，CTにて腎周囲の尿と造影剤の溢流および尿管不整像を認めた。順行性腎盂造影にて尿管の狭窄を認めたため，尿管悪性腫瘍疑いにて左腎尿管全摘術を施行した。病理の結果，炎症性細胞の浸潤を認めるが，悪性の所見はなく，病理診断は炎症性偽腫瘍という結果であった。術後7か月経過した現在，再発所見を認めていない。

A 75-year-old man presented with left abdominal pain. Abdominal CT showed left hydronephrosis and an outflow of contrast medium from the left kidney pelvis. Therefore,we constructed left nephrostomy,then performed antegrade pyelography. The image examinations,CT and antegrade pyelography disclosed tumorous stricture of the middle left ureter. Although the findings were not typical of ureteral cancer,left nephroureterectomy was performed under the diagnosis of suspected ureteral tumor. Histopathological examination demonstrated an inflammatory pseudotumor of the ureter. The patient has been followed for 7 months with no evidence of recurrence or metastasis.