Final answer:
The question lists three types of skin cancer: Basal cell carcinoma, which affects mitotically active stem cells in the stratum basale; Squamous cell carcinoma, which targets the keratinocytes of the stratum spinosum and can metastasize if untreated; and Malignant melanoma, a highly lethal cancer that causes uncontrollable growth of melanocytes.
Step-by-step explanation:
The question asks about several types of skin cancers, which include a) Basal cell carcinoma, b) Squamous cell carcinoma, and c) Malignant melanoma.
Basal cell carcinoma is a form of cancer that affects the mitotically active stem cells in the stratum basale of the epidermis. It is commonly found on the head, neck, arms, and back which are areas most susceptible to long-term sun exposure. Although UV rays are a common cause, exposure to radiation and arsenic can also lead to this type of cancer.
Squamous cell carcinoma, the second most common skin cancer, affects the keratinocytes of the stratum spinosum. If not treated early, these carcinomas can metastasize and become a serious health threat.
Malignant melanoma is a cancer characterized by the uncontrolled growth of melanocytes, the pigment-producing cells in the epidermis. It is the most fatal of all skin cancers, as it can quickly spread to other organs if not detected and treated early.
Learn more about Skin Cancers