Chylothorax means chyle (a milky lymphatic fluid that carries dietary fat and immune cells) is leaking into the chest cavity, building up around the lungs.

 

This compresses the lungs and can make breathing difficult.

 

Some cases have an identifiable cause (heart disease, cancer, blood clots, fungal disease), but many are idiopathic (no clear cause).

 

Repeated fluid build-up can trigger inflammation and fibrosis (“restrictive pleuritis”), which can permanently limit lung expansion.

 

Surgery is the most reliable long-term treatment for recurrent/idiopathic chylothorax, especially when medical management fails.