Open nephrectomy: The extreme measure for sepsis after flexible-ureteroscopy (f-URS) procedure.

URS is considered a safe method of stone treatment. Complications most often do not exceed grade II of the Clavien Dindo classification. Although it is considered safe, in some cases major complications may occur from grade III onwards. A 50-year-old man underwent f-URS for a 2.7 × 1.2 cm left medium caliceal stone; after surgery patient developed an intraparenchymal renal abscess and concomitant pulmonary and hepatic septic emboli. Despite attempts to treat it conservatively, nephrectomy was the only effective treatment. The f-URS is minimally invasive and effective procedure, although it is not free from complications.