Percutaneous methods for the treatment of urothelial tumors of the pyelocaliceal system (case report and literature review)

Urothelial carcinoma is one of the most common solid malignancies. Moreover, urothelial cancer of the ureter of a single kidney is a rare entity that requires nephron-sparing treatment and carries a high risk of postoperative recurrence. An analysis of the literature on this disease was conducted using the databases of PubMed, Scopus, and Web of Science for the period from 2011 to 2022. A clinical case of recurrence of urothelial cancer of the pyelocaliceal system of the kidney in a 73-year-old patient was presented. For the primary tumor, the patient underwent percutaneous laser en bloc resection on the narrow base of the tumor. In case of recurrence, given the acute angle of attack and the wide tumor base, bipolar loop resection became necessary. This clinical observation demonstrates the need for logistical equipment with laser, mono- and bipolar energy sources, and flexible nephroscopes for the most effective and personalized treatment.