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Keratoacanthoma is commonly found on sun-exposed skin, often face, forearms and hands. [2] [3] It is rarely found at a mucocutaneous junction or on mucous membranes. [2] Keratoacanthoma may be difficult to distinguish visually from a skin cancer. [4] Under the microscope, keratoacanthoma very closely resembles squamous cell carcinoma. In order ...
Cutaneous horns, also known by the Latin name cornu cutaneum, are unusual keratinous skin tumors with the appearance of horns, or sometimes of wood or coral. Formally, this is a clinical diagnosis for a "conical projection above the surface of the skin."
Less common skin cancers include: Merkel cell carcinoma, Paget's disease of the breast, atypical fibroxanthoma, porocarcinoma, spindle cell tumors, sebaceous carcinomas, microcystic adnexal carcinoma, keratoacanthoma, and skin sarcomas, such as angiosarcoma, dermatofibrosarcoma protuberans, Kaposi's sarcoma, leiomyosarcoma.
The following is a list of cancer types.Cancer is a group of diseases that involve abnormal increases in the number of cells, with the potential to invade or spread to other parts of the body. [1]
Solitary keratoacanthoma (subungual keratoacanthoma) Solitary trichoepithelioma; Spindle cell squamous cell carcinoma (spindle cell carcinoma) Spiradenoma; Squamous cell carcinoma Squamous cell carcinoma; Steatocystoma multiplex (epidermal polycystic disease, sebocystomatosis) Steatocystoma simplex (simple sebaceous duct cyst, solitary ...
Keratoacanthoma. Described as a "crateriform ulcer of the face" [8] by Sir Jonathan Hutchinson in 1889, [8] it was then named "molluscum sebaceum" in 1936 by MacCormac and Scarf, [9] before the term keratoacanthoma was coined by histopathologist Walter Freudenthal [10] [11] and then first formally used by Rook and the pathologist Ian Whimster ...
Despite doing a large wedge incision, a pathologist might call the biopsy keratin debris with characteristics of actinic keratosis. But provided with an accurate clinical information, he/she might consider the diagnosis of a well differentiated squamous cell carcinoma or keratoacanthoma. It is not infrequent for two, three or more biopsies to ...
The histologic criteria most helpful in distinguishing keratoacanthoma from squamous cell carcinoma have been found to include the presence of an epithelial lip and sharp outline between tumor and stroma in favor of keratoacanthoma and ulceration, numerous mitoses, and marked pleomorphism or anaplasia in favor of squamous cell carcinoma.[2 ...