Melanoma is the most lethal form of skin cancer out of the three. It originates from melanocytes, which are located inside the epidermis. The melanocytes mutate and divide at a dangerous rate, causing a skin lesion to appear on the surface that looks similar to that of a mole. There are a few risk factors that can cause Melanoma, such as family history, light hair & eye color, immunosupression, high freckle density, and having multiple melanocytic nevi. Melanoma can be diagnosed with the ABCDE method; A-Asymmetry, B-Borders, C-Colour, D-Diameter, and E-Evolution/Elevation, which are all red flags that can indicate melanoma, but it can also be diagnosed with a skin biopsy. (Video didn't have this information so I got it from https://www.cancer.org/cancer/melanoma-skin-cancer/treating/by-stage.html)Treatment is determined by your stage, if you're at 0 then the melanoma can easily be surgically removed. But if you're at stage 4, the hardest to treat, you may have to try various radiations, surgeries, and therapies. Prevention of melanoma can include sunscreen, protective clothing (such as hats and long sleeve shirts/pants), sunglasses, and regular checkups with your doctor.
Squamous Cell Carcinoma originates in the epidermis, where the squamous cell DNA becomes corrupted, and is a common form of skin cancer. It appears on the outer layer of the skin, mostly sun exposed areas such as the next, scalp, ears, lips, etc. and can come in the form of skin ulcers, or bright red "scab" like sores. It's caused from prolonged exposure to Ultra Violet Radiation produced from sunlight and other factors similar to it (such as tanning beds). Squamous Cell Carcinoma is diagnosed through laboratory examination, where they take a skin sample and study it to find any implications of the cancer beginning to develop. It's treated with various forms of chemical therapy, freezing, and electrodesiccation and curettage treatment. In order to prevent squamous cell carcinoma one can wear sunscreen year round, and wear protective clothing.
Basal Cell Carcinoma is the most common form of skin cancer, appearing a vast majority of the time in the face, neck, and scalp, appearing in many ways, like erosion or ulcers. Basal Cell Carcinoma originates in the stratum basale, or the lower layer of the epidermis, where basal cells can be found. It's diagnosed through skin biopsy, a process where a sample of skin is taken and is observed to find any abnormalities. The cancer is then treated via surgical excision and different radiation methods. The only way to prevent this cancer is to detect it quickly so you can get it treated as soon as possible.