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Squamous anal carcinoma, extensive perianal spread. Most anal cancers are squamous cell carcinomas (epidermoid carcinomas), that arises near the squamocolumnar junction. It may be keratinizing (basaloid) or non-keratinizing (cloacogenic). [17] Other types of anal cancer are adenocarcinoma, lymphoma, sarcoma or melanoma.
Squamous-cell carcinoma (SCC), also known as epidermoid carcinoma, comprises a number of different types of cancer that begin in squamous cells. [1] These cells form on the surface of the skin, on the lining of hollow organs in the body, and on the lining of the respiratory and digestive tracts .
Basal-cell carcinoma (BCC), also known as basal-cell cancer, basalioma [7] or rodent ulcer, [8] is the most common type of skin cancer. [2] It often appears as a painless raised area of skin, which may be shiny with small blood vessels running over it. [1]
Basal cell carcinoma; Squamous cell carcinoma; Squamous cell skin cancer; Skin adnexal tumors (e.g. sebaceous carcinoma) Melanoma; Merkel cell carcinoma; Keratoacanthoma; Sarcomas of primary cutaneous origin (e.g. dermatofibrosarcoma protuberans) Lymphomas of primary cutaneous origin (e.g. mycosis fungoides)
A survey of 23 countries between 1983 and 2002 showed an increase in oropharyngeal squamous cell carcinoma that was particularly noticeable in young men in economically developed countries. [221] [12] In the United Kingdom the incidence of oral and oropharyngeal cancer in men rose 51%, from 7/100,000 to 11/100,000 between 1989 and 2006. [234]
The most common form of colon cancer is adenocarcinoma, constituting between 95% [86] and 98% [87] of all cases of colorectal cancer. Other, rarer types include lymphoma, adenosquamous, and squamous cell carcinoma. Some subtypes are more aggressive. [88] Immunohistochemistry may be used in uncertain cases. [89]
Aberrant basal cell carcinoma; Acanthoma fissuratum (granuloma fissuratum, spectacle frame acanthoma) Acrospiroma (clear cell hidradenoma, dermal duct tumor, hidroacanthoma simplex, nodular hidradenoma, poroma) Actinic keratosis (senile keratosis, solar keratosis) Adenoid squamous cell carcinoma (pseudoglandular squamous cell carcinoma)
There is a risk of metastasis starting more than 10 years [citation needed] after diagnosable appearance of squamous-cell carcinoma, but the risk is low, [specify] though much [specify] higher than with basal-cell carcinoma. Squamous-cell cancers of the lip and ears have high rates of local recurrence and distant metastasis. [27]