# A Case of Yellow Nail Syndrome Complicated with Pulmonary Infection Due to Nocardia cyriacigeorgica

## TL;DR

This paper reports a rare case of yellow nail syndrome complicated by a Nocardia infection, offering insights for clinicians.

## Contribution

The novelty lies in documenting a rare combination of yellow nail syndrome and Nocardia cyriacigeorgica infection.

## Key findings

- Yellow nail syndrome can be complicated by Nocardia cyriacigeorgica pulmonary infection.
- The case highlights the importance of considering opportunistic infections in YNS patients.
- Treatment strategies for this rare combination are discussed.

## Abstract

Yellow nail syndrome (YNS) is a rare clinical syndrome characterized by nail bed changes, pulmonary involvement, and lymphatic drainage disorders. Pulmonary involvement usually manifests as bronchiectasis, bronchiolitis, and pleural effusion. There are few studies on yellow nail syndrome combined with opportunistic infection. Here, we report a case of clinically diagnosed YNS combined with Nocardia cyriacigeorgica infection and the course of treatment used, which can provide some useful information for clinicians to better understand this rare illness.