A Case of a Desmoid Tumor with an Ureterotumoral Fistula Detected on Renal Scintigraphy.

Desmoid tumors are rare benign tumors with aggressive fibroblastic proliferation. Although desmoid tumors do not metastasize, they have locally aggressive features and can cause a urinary fistula. Here, we report a case of a 35-year-old woman with Gardner syndrome who was diagnosed with an intra-abdominal desmoid tumor 1 year previously and who presented with a newly developed cystic mass lesion on a computed tomography scan. The cystic mass lesion was clinically diagnosed as an 니rin이na from the right 니reterotumoral fistula; th니s, surgical resection of the mass lesion was planned. However, Tc-99m diethylenetriamine pentaacetic acid renal scintigraphy revealed bilateral ureterotumoral fist니las; hence, the treatment plan was changed to conservative management. [ABSTRACT FROM AUTHOR]