# Metastatic Clear Renal Cell Carcinoma in Urinary Bladder at Presentation—A Rare Incidental Case Report and Literature Review

## TL;DR

This case report describes a rare instance of kidney cancer spreading to the bladder at initial diagnosis, emphasizing the importance of thorough investigations and treatment.

## Contribution

The novelty lies in presenting a rare case of metastatic kidney cancer to the bladder at initial presentation, with a literature review.

## Key findings

- Clear cell renal carcinoma was found to have metastasized to the urinary bladder at initial presentation.
- Histopathology confirmed the metastatic nature of the bladder tumor.
- The case underscores the need for multimodal treatment and follow-up in such rare presentations.

## Abstract

This case highlights the rare occurrence of concurrent clear cell renal carcinoma with metastatic urinary bladder involvement, presenting as hematuria and flank pain. Initial screening revealed both renal and bladder tumors, confirmed as metastases. Histopathology emphasized thorough investigations for unexplained urinary symptoms and the need for multimodal treatment and follow‐up.