# Partial nephrectomy in multiple mixed epithelial and stromal tumors (MEST)

## TL;DR

A 35-year-old woman with two large kidney masses underwent partial nephrectomy, revealing a rare tumor called MEST with no recurrence after surgery.

## Contribution

The paper presents a rare case of MEST managed with partial nephrectomy and confirms successful surgical treatment.

## Key findings

- The patient had two large solid-cystic kidney masses diagnosed as MEST after surgery.
- Post-operative follow-up showed normal kidney function and no local recurrence.
- Partial nephrectomy was effective for treating MEST without compromising kidney function.

## Abstract

Mixed epithelial and stromal tumor (MEST) of the kidney is not a common diagnosis. This tumor usually mimics solid-cystic malignant renal tumors and most cases are treated surgically. Here, we presented a 35-year-old female with simultaneous two separate large solid-cystic masses with contrast enhancement in lower and upper pole of left kidney which were managed surgically via partial nephrectomy. Microscopic evaluation showed solid-cystic tumor with variably sized cysts lined by flattened to cuboidal epithelium that was compatible with MEST. Follow up evaluation revealed normal parenchymal renal tissue and proper function without any evidence of local recurrence.