The patients who need surgery may have the small tested areas removed when the lesions are surgically removed. A small sample from a normal-looking area may also be removed during surgery. Patients who do not need surgery may simply have small samples taken from the lesions and a normal-looking area in the clinic rather than in the operating room. The tissues will be looked at under a microscope to see whether they are cancerous. These results will be compared with the spectroscopy results.