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The tumor may be in the form of a hard plaque or a papule, often with an opalescent quality, with tiny blood vessels; The tumor can lie below the level of the surrounding skin, and eventually ulcerates and invades the underlying tissue; The tumor commonly presents on sun-exposed areas (e.g. back of the hand, scalp, lip, and superior surface of ...
The primary cause of skin cancer is prolonged exposure to ultraviolet (UV) radiation from the sun or tanning devices. Skin cancer is the most commonly diagnosed form of cancer in humans. [ 11 ] [ 12 ] [ 13 ] There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) and melanoma . [ 1 ]
Hutchinson's mask is a patient's sensation that the face is covered with a mask or a gauzy network like cobwebs. This medical sign is associated with tabes dorsalis [ 1 ] affecting the trigeminal nerve (fifth cranial nerve CN V ).
Accumulation of these cancer cells causes a microscopic focus of abnormal cells that are, at least initially, locally confined within the specific tissue in which the progenitor cell resided. This condition is called squamous-cell carcinoma in situ , and it is diagnosed when the tumor has not yet penetrated the basement membrane or other ...
Epidermodysplasia verruciformis (EV) is a skin condition characterised by warty skin lesions. [1] It results from an abnormal susceptibility to HPV infection (HPV). It is associated with a high lifetime risk of squamous cell carcinomas in skin. [1]
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 leiomyoma, also known as leiomyoma cutis, [1] or cutaneous leiomyomata, [2] is a benign skin tumor made of smooth muscle cells. [3] There are three different types of cutaneous leiomyomas, genital leiomyomas, angioleiomyomas, and piloleiomyomas. Cutaneous leiomyomas can occur sporadically or as a part of a genetic condition.
Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer occurring in about three people per million members of the population. [1] It is also known as cutaneous APUDoma, primary neuroendocrine carcinoma of the skin, primary small cell carcinoma of the skin, and trabecular carcinoma of the skin. [2]