# Cutaneous Perineurioma of the Medial Superciliary Arch: An Uncommon Location for a Rare, Benign Spindle Cell Neoplasm

## TL;DR

A rare, benign tumor called cutaneous perineurioma was found in an unusual facial location, emphasizing the need for accurate diagnosis to prevent unnecessary treatment.

## Contribution

This case adds to the limited literature on cutaneous perineuriomas in uncommon facial locations.

## Key findings

- The tumor was located in the medial superciliary arch, a rare site for cutaneous perineurioma.
- Histological and immunophenotypic analysis confirmed the diagnosis of a benign spindle cell neoplasm.
- The case underscores the importance of recognizing this tumor to avoid misdiagnosis and overtreatment.

## Abstract

Cutaneous perineuriomas are rare, benign peripheral nerve sheath tumors that are often mistaken for other adnexal or spindle cell lesions, with facial involvement being uncommon. Recognition is important to ensure accurate diagnosis and avoid unnecessary overtreatment.

We report a case of a 36-year-old Hispanic woman with a slowly enlarging papule of the left medial superciliary arch, histologically and immunophenotypically confirmed as a cutaneous perineurioma. This case highlights the clinicopathologic features, immunohistochemical profile, and management considerations of cutaneous perineurioma arising in a rare, cosmetically sensitive facial location, adding to the limited body of published cases.