# Bilateral pulmonary parenchymal metastasis from a low-grade appendiceal mucinous neoplasm

## TL;DR

A rare case of lung metastasis from a slow-growing appendix tumor is reported, highlighting the need for chest imaging in follow-up care.

## Contribution

This case highlights the rare occurrence of distant metastasis from low-grade appendiceal tumors without local spread.

## Key findings

- A 50-year-old patient had bilateral lung metastasis from a 12-year-old appendix tumor.
- Metastasis occurred without evidence of local or peritoneal spread.
- The case suggests chest imaging may be important in surveillance protocols.

## Abstract

Low-grade appendiceal mucinous neoplasms, are the most common precursor lesions to pseudomyxomatous peritonei. They are relatively indolent in nature, with a “pushing” style of invasion. We present a case of a 50-year-old gentlemen who underwent staged video assisted thoracoscopic surgery for bilateral pulmonary metastasis secondary to a low-grade appendiceal mucinous neoplasm that had been resected 12 years prior. We highlight the under recognized rare etiology of distant metastasis without evidence of local spread, and therefore whether imaging of the chest should be considered as part of the surveillance protocol.