# Gastric Metastasis of Renal Cell Carcinoma Initially Diagnosed by Esophagogastroduodenoscopy

## TL;DR

A rare case of kidney cancer initially found in the stomach highlights the importance of considering metastatic diseases in unusual gastric lesions.

## Contribution

This case report adds to the understanding of atypical presentations of renal cell carcinoma metastasis in the stomach.

## Key findings

- A gastric lesion was diagnosed as metastatic clear cell renal cell carcinoma.
- Contrast-enhanced CT identified a primary kidney tumor and additional metastases.
- The patient's survival was 10 months despite chemotherapy.

## Abstract

Here, we report a rare case of renal cell carcinoma (RCC) initially detected as a gastric metastasis. A 58-year-old man with epigastric discomfort underwent esophagogastroduodenoscopy, which revealed a reddish semi-pedunculated lesion with a whitish coating. Biopsy and imaging confirmed clear cell RCC metastasis. Contrast-enhanced computed tomography (CT) revealed a primary renal tumor with pancreatic and lymph node metastases. Despite chemotherapy treatment, the patient died after 10 months. Gastric metastases from RCC, although rare, should be considered in highly vascular gastric lesions with white coatings. Clinicians must be vigilant for metastatic diseases with atypical gastric findings.