An excision with frozen section is a skin cancer treatment technique that involves cutting out the skin cancer and evaluating it under a microscope to determine that all of the cancer has been removed. It is different from Mohs surgery, because larger areas around the tumor are taken during the excision, the microscopic evaluation technique of the tumor is slightly different, and any surgeon (including a plastic surgeon) can perform the excision. It is also more effective than removing a lesion and sending it to a lab for evaluation because the diagnosis is done in real time, meaning the patient can be confirmed cancer free the same day as the initial appointment.