# A case of pilomatrix carcinoma found in the shoulder

## TL;DR

This paper presents a rare case of pilomatrix carcinoma on the shoulder and discusses its clinical features and treatment.

## Contribution

The novelty lies in reporting a pilomatrix carcinoma case in an unusual location (shoulder) with initial symptoms resembling a pimple.

## Key findings

- Pilomatrix carcinoma was found in the shoulder of a 64-year-old man, presenting as a small pimple with purulent discharge.
- The paper emphasizes the importance of early identification and surgical excision with wide margins to prevent recurrence.

## Abstract

To date, ~200 cases of pilomatrix carcinoma have been reported in the literature. These tumors usually present as atypical, solitary, firm nodules, most commonly in the head and neck region. Published data indicate that these tumors exhibit aggressive behavior and have a high potential for recurrence. Therefore, surgical excision with wide margins is recommended. We report a case of pilomatrix carcinoma located on the shoulder, initially presenting as a small pimple with purulent discharge in a 64-year-old man. We also review the relevant literature, with particular focus on the clinical characteristics, early identification, and treatment modalities associated with this disease.