Ch 4 PART 3 Skin Disorders and Diseases

Albinism

absence of melanin pigment of the body including the skin, hair and eyes.

Allergic contact dermatitis

an allergy to an ingredient or a chemical, usually caused by repeated skin contact with the chemical.

Anaerobic

cannot survive in the presence of oxygen.

Basal cell carcinoma

most common and least severe type of skin cancer; often characterized by light or pearly nodules.

Contact dermatitis

an inflammation of the skin caused by having contact with certain chemicals or substances; many of these substances are used in cosmetology.

Extrinsic factors

primarily environmental factors that contribute to aging and the appearance of aging.

Free radicals

unstable molecules that cause biochemical aging, especially wrinkling and sagging of the skin.

Intrinsic factors

skin aging factors over which we have little control.

Irritant contact dermatitis

occurs when irritating substances temporarily damage the epidermis.

Lentigines

technical term for freckles; small yellow to brown colored spots on the skin exposed to sunlight and air.

Leukoderma

skin disorder characterized by light abnormal patches (hypopigmentation) caused by a burn or congenital disease that destroys the pigment-producing cells.

Malignant melanoma

most serious form of skin cancer; often characterized by black or dark brown patches on the skin that may be uneven in texture, jagged, or raised.

Nevus

birthmark.

Noncomedogenic

product that has been designed and proven not to clog the follicles.

Retention hyperkeratosis

the hereditary tendency for acne-prone skin to retain dead cells in the follicles, forming an obstruction that clogs follicles and exacerbates inflammatory acne lesions such as papules and pustules.

Sensitization

allergic reaction created by repeated exposure to a chemical or a substance.

Squamous cell carcinoma

type of skin cancer more serious than basal cell carcinoma; often characterized by scaly red papules or nodules.

Stain

abnormal brown or wine-colored skin discoloration with a circular and/or irregular shape.

Tan (skin)

change in pigmentation of the skin caused by exposure to the sun or ultraviolet light.

Vitiligo

hereditary condition that causes hypopigmented spots and splotches on the skin that often appear milky white.

Chloasma

hyperpigmentation in spots, generally caused by sun exposure or aging.

Melasma

pregnancy mask.