Skin cancer is the most widely spread type of cancer in the whole world, so there are lots of skin patients every year. Usually they come to the doctor in relatively incipient stages because the signs and symptoms are rather obvious, as the skin is on the outside of the body. Especially the cancerigen moles that are located on the face, neck and hands are very visible and this leads to an early diagnosis, so to an increased chance of being cured. Normally the treatment of choice is surgery, as all these malignant lomes or nevi must be removed from the skin in some way, but even though surgery has multiple subtypes for removing the damaged tissue.
There's the simple excision when the surgeon removes the affected tissue together with some healthy tissue around in order to avoid any bad cells behind. Then there's laser therapy that uses a small laser beam for removing the damaged cells or tissue from the surface of the skin. Another procedure used in skin cancer treatment is Mohs micrographic surgery - it is a bit more special because the surgeon removes the affected tissue layer by layer, acting with extreme care and precision and usually examining the removed tissue under the microscope in order to make sure there are no cancer cells left.
Electrodessication and curettage is a bit different as it burns tha cancer cells and then removes them by using a shapr surgical object, usually a scalpel. To the opposite side there's criosurgery that uses liquid nitrogen or carbon dioxyde to kell the cancer cells. Dermabrasion uses a kind of spinning device to remove the top skin layer where there are the cancer or pre-cancer cell formations.
Radiotherapy is used in almost all forms of cancer and it uses different types of radiation, normally X-rays with a very high energy with the purpose of killing the cancer or make the tumours shrink.
Chemotherapy uses drugs to kill the cancer cells and it can be either regional (when it is injected in a certain organ and focuses only on the cancer cells found there) or systemic and in this case the medication is taken orally or intravenously and it spreads all over the body killing any cancer cells it may find on the way.
Except for these types of skin cancer treatment I have mentioned there are also some other new types that are more or less experimental like biologic therapy which is sometimes refered to as immunotherapy that uses the patient's immune system to produce some substances that help it fight cancer .