Melanoma originates in melanocyte cells found in the top layer of our skin: the innermost layer of the epidermis. Melanoma is considered the most dangerous form of skin cancer as it typically will spread to other areas of the body, including organs if left untreated.
What type of tissue does melanoma occur in?
It can easily spread into deep layers of skin as well as to lymph nodes and other organs. The skin’s layers include the epidermis (outer layer), dermis (inner layer) and hypodermis (subcutaneous tissue). Melanoma typically develops in the epidermis, which contains melanocytes.
What layer of skin melanoma originates in?
Melanoma starts in cells in the skin called melanocytes. These cells are in the deep layer of the epidermis between the layer of basal cells.
What type of cells tissue does skin cancer start developing?
Skin cancer begins in the epidermis, which is made up of three kinds of cells: Squamous cells: Thin, flat cells that form the top layer of the epidermis. Basal cells: Round cells under the squamous cells.
Where does melanoma usually start?
Melanomas can develop anywhere on the skin, but they are more likely to start on the trunk (chest and back) in men and on the legs in women. The neck and face are other common sites.
What cells and tissues does melanoma affect?
Melanoma can develop anywhere melanocytes are found, including the eye (ocular melanoma), digestive tract and lymph nodes, although these sites are less common. Melanoma is less common than squamous cell and basal cell skin cancers, and accounts for only 5 percent of all skin cancers.
Do melanomas appear suddenly?
Melanoma may suddenly appear without warning, but can also develop from or near an existing mole. It can occur anywhere on the body, but is most common on the upper back, torso, lower legs, head, and neck.
Where does squamous cell originate?
About 2 out of 10 skin cancers are squamous cell carcinomas (also called squamous cell cancers). These cancers start in the flat cells in the upper (outer) part of the epidermis. These cancers commonly appear on sun-exposed areas of the body such as the face, ears, neck, lips, and backs of the hands.
What is a squamous?
(SKWAY-mus sel KAR-sih-NOH-muh) Cancer that begins in squamous cells. Squamous cells are thin, flat cells that look like fish scales, and are found in the tissue that forms the surface of the skin, the lining of the hollow organs of the body, and the lining of the respiratory and digestive tracts.
What is the difference between basal cell and squamous cell carcinoma and melanoma?
Melanoma typically begins as a mole and can occur anywhere on the body. Squamous cell carcinoma may appear as a firm red bump, a scaly patch, or open sore, or a wart that may crust or bleed easily. Basal cell carcinoma may appear as a small white or flesh-colored bump that grows slowly and may bleed.