Keratoma
An area of hardened skin, usually called a callus which is usually a response to frictional trauma to the skin.
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- Keratosis
A localized horny overgrowth of the skin, such as a wart or callus. Among the common types of keratosis are actinic keratosis and seborrheic keratosis.
- Keratosis follicularis
A genetic skin disease that is characterized by slowly progressive hardening of the skin (keratosis) around the hair follicles. This disorder is inherited in an autosomal dominant manner and is due to mutation in a gene called ATP2A2 on chromosome 12. Also known as Darier disease.
- Keratosis pilaris
Small rough bumps, generally on the face, upper arms, and thighs. Keratosis refers to a localized overgrowth of the upper layer of skin. Pilaris pertains to the hair. In keratosis pilaris, the buildup of keratin (the hard protein in the skin, nails, and hair) is limited to the hair follicles.
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- Keratosis, actinic
A small rough spot on the skin that can give rise to a skin cancer called squamous cell carcinoma. Actinic keratosis is due to excessive sun exposure and most frequently occurs in fair-skinned people after 40 years of age. Common locations for actinic keratosis are the face, scalp, nape of the neck, upper chest, forearms, […]