why is biopsy done?
<answer> A doctor should recommend a biopsy when an initial test suggests an area of tissue in the body isn't normal. <context> A biopsy is a sample of tissue taken from the body in order to examine it more closely. A doctor should recommend a biopsy when an initial test suggests an area of tissue in the body isn't normal. Doctors may call an area of abnormal tissue a lesion, a tumor, or a mass.