Metástasis ureteral contralateral por tumor renal de células claras

Renal cell carcinoma represents 2-3% of all cancers and is the most frequent solid lesion of the kidney. Incidental diagnosis is made through imaging studies in approximately 50% of the cases and the majority are asymptomatic. Radical surgical treatment is the basis of management, and follow-up through imaging techniques is a priority for detecting local or systemic recurrence.

A 60-year-old man had a past history of left radical nephrectomy due to kidney tumor 10 years prior. His current clinical manifestation was painless gross hematuria. CT-urography showed right ureteropelvic ectasia with a lesion occupying the distal third of the ureter that caused a negative filling defect. Endoscopy examination, lesion excision, and adjuvant therapy based on tyrosine kinase inhibitor (sorafenib) were carried out.

This clinical case underlines the importance of strict follow-up in patients with renal neoplasias in the absence of clear knowledge of the metastatic behavior and predictable dissemination routes in renal cell carcinoma.