text: Skin cancer is the most common type of cancer in this country. About one million Americans develop skin cancer each year. Skin cancer begins in<unk> s, the building blocks that make up the skin. Normally, skin<unk> s grow and divide to form new<unk> s. Every day skin<unk> s grow old and die, and new<unk> s take their place. Sometimes, this orderly process goes wrong. New<unk> s form when the skin does not need them, and old<unk> s do not die when they should. These extra<unk> s can form a mass of tissue called a growth or tumor. These tumors can be either benign or malignant.
  Benign tumors:
  are not cancer.
  are rarely life-threatening.
  do not invade surrounding tissues and spread to other parts of the body.
  generally, can be removed and won't grow back.
  Malignant tumors:
  are cancer.
  can be life-threatening.
  can invade and damage surrounding tissues and spread to other parts of the body.
  often can be removed but may grow back.
  The two most common types of skin cancer are<unk> <unk>  cancer and squamous<unk>  cancer. These cancers usually form on the head, face, neck, hands, and arms. These areas are exposed to the sun, but skin cancer can occur anywhere.<unk>  is skin cancer that forms in<unk> <unk> s (small, round<unk> s in the base of the outer layer of skin).<unk> <unk>  skin cancer grows slowly. It usually occurs on areas of the skin that have been in the sun and is most common on the face.<unk> <unk>  cancer rarely spreads to other parts of the body.
option_0: Basal cell carcinoma
option_1: Trichoepithelioma
option_2: Actinic keratosis
option_3: Lymphoepithelioma
option_4: Angiokeratoma
option_5: Medulloepithelioma
option_6: Merkel cell cancer
option_7: Pyogenic granuloma