# Concurrent Occurrence of Trichilemmal Cyst and Nevus of Ota: Case Series

## TL;DR

This paper reports three cases where individuals had both a trichilemmal cyst and nevus of Ota, which are rare skin conditions.

## Contribution

The novelty lies in documenting the concurrent occurrence of two rare dermatological conditions in multiple patients.

## Key findings

- Three patients presented with both trichilemmal cyst and nevus of Ota.
- The cases highlight a rare coexistence of two distinct dermatological conditions.
- The findings suggest a possible but unexplained association between these two skin conditions.

## Abstract

Nevus of Ota or congenital oculodermal melanosis (ODM) is characterized by brown or blue/gray asymptomatic brown or blue/gray flat lesions of the skin, mucosae, episcleral/sclera, and uvea, which are located near the trigeminal nerve's ophthalmic and mandibular branches. The main ophthalmic complications are glaucoma and predisposition to uveal melanoma. "trichilemmal cyst" is also known as "wen" "pilar cyst" or " isthmus catagen cyst". It occurs in the scalp and mimics sebaceous cysts clinically. The swelling appears smooth in outline and is filled with cytokeratin. An unusual case of a 32-year-old male with both trichilemmal cyst and nevus of Ota, a 27-year-old female, and a 47-year-old male with nevus of Ota is discussed here.