
Skin Cancer
The top layer of skin, called the epidermis, has 3 types of cells: squamous cells, basal cells, and melanocytes. Squamous cells are thin cells on the surface of the skin, while basal cells are round cells below those and melanocytes produce pigments. Fortunately, squamous cell and basal cell cancers are both the most common types of skin cancer and highly treatable. Melanoma, skin cancer starting in the melanocytes, is more likely to be deadly. The ABCDE rule for moles makes it easy to detect melanoma early, thus leading to early treatment and better outcomes. Asymmetry, jagged or irregular borders, uneven color, diameter larger than a pea, or evolving/changing moles can all be signs of melanoma and should be checked by a doctor.