a small, localized section of an organ is removed, often for a biopsy.

Operation to remove a small V-shaped piece (wedge) of an organ. A wedge resection may be done on a breast, lung, or liver, for example.

A surgical procedure to remove a triangle-shaped slice of tissue. It may be used to remove a tumor and a small amount of normal tissue around it.

Surgery to remove a wedge of tissue from one lobe of one lung that is usually done only for early-stage disease or isolated tumors.