Effectiveness of single flexible ureteroscopy for multiple renal calculi.

Purpose: To assess effectiveness of flexible ureteroscopy (fURS) in patients not with simple but with multiple unilateral renal stones.

Patients And Methods: A database analysis was performed to identify patients with multiple unilateral intrarenal stones. Patients were treated using an 8.

[Presacral schwannoma with degenerated areas ("ancient schwannoma")].

A presacral, degenerative schwannoma ("ancient schwannoma") is a rare entity. The clinical signs are nonspecific, and a reliable preoperative diagnosis is difficult. Tumor heterogeneity with calcifications may be seen in degenerated schwannomas on MRI or CT but not necessarily.