While most moles and other skin growths are not of medical concern, it is important to screen for cancer and other skin conditions that can develop in some cases. Full-body skin exams to detect any new moles and growths, as well as to monitor existing growths, are recommended on a yearly basis in order to screen for skin cancer and detect any abnormalities in their earliest stages. To classify a mole, your doctor will evaluate its color, size, border and any asymmetries that may indicate a potential for cancer. If any suspicious lesions are found during this exam, additional testing will likely be performed.