Mixed epithelial and stromal tumor of the kidney extending to the proximal ureter in a 41-year-old female.

We report the case of a 41-year-old pregnant female who presented with a complicated urinary tract infection. Further imaging revealed left hydronephrosis and filling defects extending from the proximal ureter to the upper pole of the kidney, with the presumed diagnosis of a fibroepithelial polyp. The patient underwent a four-stage percutaneous and ureteroscopic ablation and resection.

Conversion from Cystine to Noncystine Stones: Incidence and Associated Factors.

Purpose: Patients with cystinuria are often treated with medical alkalization and shock wave lithotripsy, although each treatment is hypothesized to increase the risk of calcium phosphate stones. We performed a multicenter retrospective review to evaluate whether stones of another composition develop in patients with cystinuria and with what frequency.

Materials And Methods: We retrospectively reviewed the records of a multi-institutional cohort of patients with cystinuria.