CHEMO MAY CAUSE BREAST CANCER TO SPREAD TO THE LUNGS 

Chemotherapy may cause breast cancer to spread, alarming research suggests.

The commonly prescribed chemo drugs paclitaxel and doxorubicin cause breast tumours to release proteins that then circulate in the blood until they reach the lungs, triggering the disease's onset in a new part of the body.

When scientists - from the Swiss Institute for Experimental Cancer Research - blocked this protein in a lab model, the cancer did not spread. 

They hope their findings - released last December - will help make chemotherapy more effective

https://www.dailymail.co.uk/health/article-6695307/Early-stages-lung-cancer-detected-simple-blood-test.html