Upper urinary tract urothelial tumors are rarely seen. Only 5% of all transitional cell carcinomas (TCCs) originate from the upper urinary tract. Although skin metastases in urinary tumors are quite rare, the incidence of skin metastases in upper urinary tract TCCs is not exactly known due to the lack of published research on this subject. In this article, we aimed to present a lesion consistent with TCC metastasis in the left inguinal region of a patient who was operated on for a renal pelvic mass. A 61-year-old male patient underwent left laparoscopic nephrectomy because of a mass reported as renal cell carcinoma (RCC) in the upper pole of the left kidney. After the pathology result reported the presence of left renal TCC, the patient underwent left ureterectomy plus cuff resection in an another medical center. After this second operation, the skin lesion developing at the trocar entry site on the left inguinal region of the patient was reported as an abscess on imaging. The histopathology of the excised abscess was reported as TCC metastasis. There is no consensus on the treatment regimen for skin metastases of urothelial carcinomas, and these metastases have a relatively poor prognosis. One -year survival rate is generally 35%. The patient in our case received gemcitabine and cisplatin treatment and has been under oncology follow-up for twelve months.

Keywords : kidney cancer, metastasis, transitional cell carcinoma, skin