Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant
Dr. Shane Chapman, MD discusses Skin Cancer Squamous Cell Carcinoma Keratoacanthoma Variant. See more at www.dermnet.com PLEASE RATE AND COMMENT!!! Keratoacanthomas appear suddenly and grow rapidly. They reach a certain size, usually 0.5 cm to 2.0 cm, stop growing, and then regress weeks to months later. They begin as red-to-flesh colored, dome-shaped papules with a smooth surface and a central crater filled with a keratinous plug. The pathologist sometimes has difficulty differentiating a keratoacanthoma from SCC. While keratoacanthomas have been regarded in the past as self-limited, regressing lesions that resemble squamous cell carcinoma, most dermatologists today would classify them as squamous cell carcinoma variants. They should be treated as other forms of squamous cell carcinoma.
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Keratoacanthoma Appearance
Dr. Shane Chapman, MD discusses Keratoacanthoma Appearance. See more at www.dermnet.com PLEASE RATE AND COMMENT!!! A keratoacanthoma is a characteristic solitary flesh-colored to red, crateriform nodule, usually 0.5 to 2.0 cm in diameter. The lesion erupts rapidly and is often quite tender. A central keratotic plug or depression conceals a deep keratinous cavity. This plug or depression gives the nodule its characteristic volcano-like shape. The nodule is firm in texture, tender to palpation and pressure. Keratoacanthoma nearly always appears on sun-damaged skin. Typical locations include the face, neck, dorsal hands and sun exposed extremities. It occurs on the legs more often in women.
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