What are the types of skin cancer?
Basal cell carcinomas arise from the basal cells in the epidermis (outer layer of skin). It appears as a painless raised area on the skin that may be shiny with small blood vessels running over it or as a raised area with an ulcer. This is the most common type of skin cancer and is usually treatable because it doesn’t spread far.
Squamous cell carcinoma arises from the squamous cells in the epidermis. It usually appears as a hard lump with a scaly top but may also form an ulcer. They are more likely to metastasize if they are not detected and treated early.
Melanoma is cancer that develops from melanocytes, the skin cells that produce melanin pigment. Melanomas resemble moles and sometimes arise from them. Melanoma is less common than other types of skin cancer but is more likely to grow and spread.
Merkel cell carcinoma is rare, aggressive skin cancer. The tumors appear as firm, painless lesions or nodules beneath the skin and in hair follicles on sun-exposed areas. They are usually associated with Merkel cell polyomavirus and have high risks of recurring and metastasizing.
Skin lymphomas or cutaneous lymphomas arise in cells of the immune system in the skin.
This is a rare skin cancer that develops in lymph nodes or blood vessels in the skin. They appear as red, brown, or purple patches or tumor on the skin or mucous membranes. It is seen in people with severely compromised immune systems, such as AIDS or inborn defects in white blood cells.
- Sebaceous gland carcinoma:
Sebaceous gland carcinoma is an uncommon, aggressive cancer that develops from the sebaceous (oil) glands in the skin. They usually appear as hard, painless nodules.