When this occurs abnormal cells grow out of control and form a mass, known as a tumor. Skin cells that are healthy and in normal conditions, divide in an orderly way to replace dead cells and grow new skin. In order to understand how skin cancer is conceived, we must first understand that not all skin cancers are deadly or life threatening. At least 60% of all skin tumors are considered Benign or non- malignant tumors. These tumors grow in very few of our skins layers, and do not invade or surround vital organs or tissues. On the other hand malignant or cancerous tumors crowd out and destroy most healthy cells in our body this, in consequence leads to the growth of tumors in the epidermis section of our skin. Malignant tumors are mainly caused by Ultraviolet radiation (UV) that comes from the sun. UV rays damage our DNA and cause abnormal growth in our skin cells. There are two main types of ultraviolet radiation; ultraviolet A (UVA) and ultraviolet B (UVB), both contribute to the formation of malignant tumors. Sun exposure is the leading cause for skin cancer but there are other cases in which skin cancer can develop. For example, between 5% and 10% of all skin melanomas are …show more content…
DNA: molecule found in cells that encodes genetic information.
[ 2 ]. Tumor or Tumour: solid lesion formed by an abnormal growth of cells which looks like a swelling.
[ 3 ]. UVA: One of the three types of ultraviolet radiations caused by the sun, 98.7% of its rays reaches the earth’s surface.
[ 4 ]. UVB: One of the three types of Ultraviolet radiations caused by the sun, it is said that extreme exposure to UVB rays is one of the main causes of skin cancer.
[ 5 ]. Carcinogen: any substance, radionuclide, or radiation that is an agent directly involved in causing