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onych/o
fingernail or toenail
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actinic keratosis
A precancerous skin lesion that occurs on sun-damaged skin.
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albinism
A genetic condition characterized by a deficiency or absence of pigment in the skin, hair, and irises due to a missing enzyme necessary for the production of melanin.
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alopecia
The partial or complete loss of hair, most commonly on the scalp; also known as baldness.
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blepharoplasty
Surgical reduction of the upper and lower eyelids by removing sagging skin; also known as a lid lift.
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bulla
A large blister that is usually more than 0.5 cm in diameter; plural, bullae.
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capillary hemangioma
A soft, raised, pink or red vascular birthmark.
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carbuncle
A cluster of connected furuncles (boils).
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cellulitis
An acute, rapidly spreading infection within the connective tissues.
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chloasma
A pigmentation disorder characterized by brownish spots on the face; also known as melasma or the mask of pregnancy.
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cicatrix
A normal scar resulting from the healing of a wound; plural, cicatrices.
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comedo
A noninfected lesion formed by the buildup of sebum and keratin in a hair follicle; also known as a blackhead; plural, comedones.
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debridement
The removal of dirt, foreign objects, damaged tissue, and cellular debris from a wound to prevent infection and promote healing.
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dermatitis
Inflammation of the skin.
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diaphoresis
Profuse, but not necessarily excessive, sweating.
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dysplastic nevi
Atypical moles that may develop into skin cancer.
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ecchymosis
A large, irregular area of purplish discoloration due to bleeding under the skin; plural, ecchymoses.
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eczema
A form of persistent or recurring dermatitis characterized by redness, itching, and dryness with possible blistering, cracking, oozing, or bleeding.
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erythema
Redness of the skin due to capillary dilation.
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erythroderma
Abnormal redness of the entire skin surface.
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exanthem
Refers to a widespread rash, usually in children.
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exfoliative dermatitis
A condition in which there is widespread scaling of the skin, often with pruritus, erythroderma, and hair loss.
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folliculitis
Inflammation of the hair follicles that is especially common on the limbs and in the beard area on men.
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furuncles
Large, tender, swollen areas caused by a staphylococcal infection around hair follicles or sebaceous glands; also known as boils.
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granuloma
A small knotlike swelling of granulation tissue in the epidermis.
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hematoma
A swelling of clotted blood trapped in the tissues.
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hirsutism
Excessive bodily and facial hair in women, usually occurring in a male pattern.
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ichthyosis
A group of hereditary disorders characterized by dry, thickened, scaly skin.
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impetigo
A highly contagious bacterial skin infection characterized by isolated pustules that become crusted and rupture.
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keloid
An abnormally raised or thickened scar that expands beyond the boundaries of the original incision.
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keratosis
Any skin growth, such as a wart or callus, in which there is overgrowth and thickening of the skin; plural, keratoses.
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koilonychia
A malformation of the nails in which the outer surface is concave or scooped out like the bowl of a spoon; also known as spoon nail.
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lipedema
A chronic abnormal condition, usually in women, that is characterized by the accumulation of fat and fluid in the tissues just under the skin of the hips and legs.
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lipoma
A benign, slow-growing fatty tumor located between the skin and the muscle layer.
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macule
A discolored, flat spot, such as a freckle, that is less than 1 cm in diameter.
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malignant melanoma
A type of skin cancer that occurs in the melanocytes.
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necrotizing fasciitis
A severe infection caused by Group A strepbacteria that enters the body through a wound. If untreated, the infected body tissue can be destroyed and the illness may be fatal; also known as flesh-eating bacteria.
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onychocryptosis
Ingrown toenail in which the edges of a toenail curve inward and cut into the skin.
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onychomycosis
A fungal infection of the nail.
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papilloma
A benign, superficial, wartlike growth on the epithelial tissue or elsewhere in the body, such as in the bladder.
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papule
A small, raised, red lesion, such as an insect bite, that is less than 0.5 cm in diameter.
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paronychia
An acute or chronic infection of the skin fold around a nail.
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pediculosis
An infestation with lice.
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petechiae
Small pinpoint hemorrhages less than 2 mm in diameter; singular, petechia.
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pruritis
Itching associated with most forms of dermatitis.
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psoriasis
A common skin disorder characterized by flare-ups in which red papules covered with silvery scales occur on the elbows, knees, scalp, back, or buttocks.
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purpura
The appearance of multiple purple discolorations on the skin caused by bleeding underneath the skin.
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purulent
Producing or containing pus.
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rhytidectomy
The surgical removal of excess skin and fat from the face for the elimination of wrinkles; also known as a facelift.
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rosacea
A chronic condition of unknown cause, characterized by tiny red pimples and broken blood vessels.
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scabies
A skin infection caused by an infestation of itch mites that cause small, itchy bumps and blisters by burrowing into the top layer of human skin to lay their eggs.
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scleroderma
An autoimmune disorder in which the connective tissues become thickened and hardened.
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seborrhea
Overactivity of the sebaceous glands that results in the production of an excessive amount of sebum.
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squamous cell carcinoma
A malignant tumor of the scaly squamous cells of the epithelium; however, it can quickly spread to other body systems.
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systemic lupus erythematosus
An autoimmune disorder characterized by a red, scaly rash on the face and upper trunk. This condition also attacks the connective tissue in other body systems, especially in the joints.
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tinea
A fungal infection of the skin, hair, or nails; also known as ringworm.
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urticaria
Itchy wheals caused by an allergic reaction; also known as hives.
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verrucae
Small, hard skin lesions caused by the human papillomavirus; also known as warts; singular, verruca.
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vitiligo
A skin condition resulting from the destruction of the melanocytes due to unknown causes and causing irregular patches of white skin.
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wheal
A small bump that itches and can appear as a symptom of an allergic reaction; a welt.
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xeroderma
Excessively dry skin; also known as xerosis.
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pustule
a small, circumscribed lesion containing pus; a pimple
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