# Bilateral Metastatic Gynecomastia from Small-Cell Lung Tumors in a Man: A Report of a Rare Case

## TL;DR

A man with a history of smoking developed painful gynecomastia, which was found to be metastases from a rare type of lung cancer.

## Contribution

This report adds to the limited literature on breast metastases from small-cell lung cancer in men.

## Key findings

- Bilateral gynecomastia was diagnosed as metastases from a small-cell lung tumor.
- The case emphasizes the rarity of breast metastases from this cancer type in men.

## Abstract

A case of a man with the recent onset of painful bilateral firm gynecomastia is reported. Mammography confirmed increased breast density. Biopsy characterized both masses as metastases of a small-cell lung tumor.

This case highlights the atypical presentation and complements the literature regarding the rarity of breast metastases from small-cell lung cancer in men.

Teaching point: Bilateral gynecomastia in a man with a long history of cigarette smoking should be considered with caution.