# Renomedullary Interstitial Cell Tumor in the Background of a Renal Oncocytoma: A Case Report

## TL;DR

A rare case of a benign kidney tumor called Renomedullary Interstitial Cell Tumor is reported alongside a renal oncocytoma in a 46-year-old woman.

## Contribution

This case report highlights the unique clinical and radiological presentation of RMICT in the context of a renal oncocytoma.

## Key findings

- RMICTs are rare and often asymptomatic, typically discovered incidentally.
- Coexistence of RMICT with a larger renal mass can mimic metastatic disease radiologically.
- Individualized patient-centered management is recommended based on clinical presentation.

## Abstract

Renomedullary interstitial cell tumors (RMICTs) are rare benign renal tumors that arise from the renal medulla. They are rarely symptomatic and are mostly discovered incidentally. Radiologically, their co-presence ipsilaterally in the background of a larger mass introduces a miscellaneous presentation that raises the suspicion of metastatic disease. A characteristic presentation does not exist. Therefore, an individualized, patient-centered approach should be tailored depending on the nature of the presentation. We report the clinical, radiological, and histopathological presentation of a 46-year-old woman presenting with an RMICT in the background of a renal oncocytoma.