Keratoacanthoma is a benign painless tumor that resembles Squamous Cell Carcinoma and may be related to this cancer. It’s believed to originate from the neck of the hair follicle. It occurs in sun exposed areas like the face, forearms and hands. Keratoacanthoma starts out as a small bump like a pimple and rapidly grows to a mound-shaped body with a central crater filled with keratin (a protein found in skin, nails and hair). If left untreated, it will go away in approximately 6 months. The center plug will push out and the bump will flatten, leaving a depressed scar.
Melanoma-in-situ is a melanoma in the earliest stage. The melanoma is localized on the top layer of skin and has not yet spread to other tissues nor invaded deep layers of skin. Persons diagnosed with melanoma-in-situ who seek medical treatment have the highest survival rate. Even with the high success rate for cure, routine examinations are necessary to detect recurrence. Melanomas found in later stages are not easily or successfully treated.
Merkel Cell Carcinoma is a rare, aggressive skin cancer that appears as a flesh-colored or bluish-red bump. It may look like a mole, freckle or bump that changes in size, shape and/or color. It tends to grow fast and spreads quickly to other parts of the body. Merkel Cell Carcinoma can be found on the head, face or neck. It is painless and slight trauma to the area may cause it to bleed, i.e. washing, shaving. Long term sun exposure or a weak immune system including people with HIV infection, increases the risk of developing Merkel Cell Carcinoma. White males are more likely to be affected.
Sebaceous Carcinoma is a rare skin cancer and is only found in areas containing sebaceous glands. About 75% of all sebaceous carcinomas are found on the eyelids. These occur as a small, slowly growing mass and are found on the upper eyelid more often than the lower eyelid. It may have the appearance of a sty or pinkeye. When Sebaceous Carcinoma occurs on the parts of the body, it is a pink to reddish-yellow mass that may bleed. This cancer is aggressive and can spread to the lymph nodes or other areas. Only a biopsy can identify this cancer as it can appear to be another disease or condition.
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