Transbronchial lung biopsy.

If your doctor spots something out of the ordinary on your chest  CT scan or X-ray, they may ask you to get a lung biopsy. In this procedure, a doctor removes a small sample of cells from your lung and checks it under a microscope for signs of disease. There are various reasons why a doctor might recommend a lung biopsy. They may choose from several types of biopsy, depending on the most suitable for the individual.