Mohs surgery is a precise surgical technique used to remove skin cancer, named after Dr. Frederic E. Mohs, who invented the technique in the 1930s. During the procedure, the surgeon removes thin layers of skin one layer at a time and examines each layer under a microscope to determine if any cancer remains. This process continues until only cancer-free tissue remains. Mohs surgery is considered the most effective technique for treating many basal cell carcinomas (BCCs) and squamous cell carcinomas (SCCs), including those in cosmetically and functionally important areas around the eyes, nose, lips, ears, scalp, fingers, toes, or genitals. The procedure is performed by doctors who are specially trained to fulfill three roles: as the surgeon who removes the cancerous tissue, as the pathologist who analyzes the lab specimens, and as the surgeon who closes or reconstructs the wound. The advantages of Mohs surgery include efficient, cost-effective treatment, precise results, and the highest cure rate. The cure rate for a skin cancer that has not been treated before can be up to 99%, and up to 94% for a skin cancer that has recurred after previous treatment. Mohs surgery is performed under local anesthesia on an outpatient basis, and the entire procedure usually lasts several hours. The goal of Mohs surgery is to remove all of the skin cancer without hurting the healthy skin around it, which makes it more likely that the cancer is cured and reduces the need for other treatments or more surgery.