# Epidermal inclusion cyst after breast reduction mammoplasty

## TL;DR

A 74-year-old woman developed a benign epidermal inclusion cyst in her right breast after a breast reduction surgery, highlighting the importance of recognizing this condition to avoid misdiagnosis.

## Contribution

The paper provides a detailed characterization of the pathogenesis, clinical, and imaging features of epidermal inclusion cysts.

## Key findings

- An epidermal inclusion cyst was identified in a patient with a history of breast cancer surgery and reduction mammoplasty.
- The cyst was confirmed benign but noted for its potential to develop into squamous cell carcinoma.
- The case emphasizes the need for accurate diagnosis to differentiate EIC from malignancies.

## Abstract

We report a case of a 74-year-old female with left breast multicentric invasive ductal carcinoma status post left mastectomy with reconstruction and right breast symmetrizing reduction mammoplasty presenting with a new asymmetry of the right breast that was found to be an epidermal inclusion cyst (EIC) upon core needle biopsy. The aim of the case report is to characterize the pathogenesis of EIC as well as its clinical and imaging features. This benign entity is of significance due to its malignant potential to squamous cell carcinoma.