Dermatology Terms

Acne - a multifactorial disease, commonly seen in adolescents
Age: 10-17 years in females; 14-19 in males; may appear for the first time as late as 25 years or older
Sex: More severe in males
Occupation: Exposure to mineral oils, dioxin, and other acnegenic substances.
Drugs: Lithium, hydantoin, topical and systemic corticosteroids, and oral contraceptives may cause acne to flare
Other Factors: Endocrine factors, emotional stress
Actinic - solar or sun
Actinic keratosis - a precancerous lesion arising on sun-exposed skin
Atrophy - thinning of the skin, due to overuse of topical steroids
Basal cell carcinoma - the most common form of skin cancer
Bulla - A large vesicle (blister)
Carcinoma - cancer
Crust - dried material on the surface of skin (ie: a scab)
Cyst - a cavity containing liquid or semisolid material (fluid, cells, and cell products)
Dermatoheliosis - sun-damage
Dermatology - study of skin and skin-related structures (hair & nails)
Eczema - interchangeable with dermatitis
Contact (allergic) eczematous dermatitis: caused by an allergic reaction to some substance in previously sensitized skin (ie: poison ivy)
Contact (non-allergic / irritant) dermatitis: caused by action of chemical irritant on the skin
Age: No influence on sensitization; however uncommon in children
Race: Black skin possibly less susceptible
Occupation: Second most common cause of occupational disability
Esthetician - an individual trained in skin care
Eruption (or rash) - describes more widespread skin involvement, normally composed of several lesions which may be the primary pathology or due to secondary factors (scratching, infection, etc.).
Excoriation - superficial lesions due to scratching, rubbing, or picking
Folliculitis - inflammation of the hair follicles
Impetigo - a superficial infection involving the skin (caused by staphylococcus aureus and streptococcus pyogenes) characterized by honey-color crusting
Lesion - describes an area of disease - usually small
Lichenification - chronic thickening of the skin from scratching or rubbing
Macule - flat, nonpalpable circumscribed area of change in the skin. Macules are < 1-2 cm in size
Nodule - palpable, solid, round, or ellipsoidal lesion
Papule - small solid elevation of skin generally < 5 mm in diameter
Plaque - palpable, patch of skin, as seen in psoriasis.
Psoriasis - characterized by chronic scaly areas in characteristic sites of the body, largely related to repeated minor trauma: scalp, elbows, forearms lumbosacral region, knees, hands, and feet
Pustule - a blister that contains pus
Scale - accumulation or abnormal shedding of skin in perceptible flakes (as in dandruff or psoriasis)
Scar - the area of injury is replaced by thickened or atrophic skin
Shingles - a reactivation of the chicken pox virus (Herpes Zoster)
Squamous cell carcinoma - the second most common form of skin cancer, sometimes arising in an actinic keratosis
SPF -
sun protection factor
An example: if you would normally burn in 30 minutes without sunblock, and you use a sunblock with an SPF of 15, you can stay outdoors for 30X15=450 minutes (=7 1/2 hours) before you burn
Tinea corporis - “ringworm”
Tinea cruris - “jock itch”
Tinea pedis - athlete’s foot
Ulcer - skin loss extending, essentially a "hole in the skin"
Vesicle - a blister
Warts -
(=verrucae)

Warts are NOT cancerous growths, but are caused by a virus. This virus ONLY affects human beings. Warts are usually rough and skin-colored. Warts are classified by their location.
Common warts grow on the fingers, hands, or around the nails.
Plantar warts grow on the feet or toes. They usually cause discomfort when pressure is applied.
Flat warts tend to grow in large numbers, usually on children and on the face. In adult men and women, they are spread by shaving.
Genital warts =condyloma

Wheal - transitory, compressible papule or plaque (= a hive)

 


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