Quiz 2 Flashcards
The avascular superficial layer of skin; pigment producing melanocytes in this layer provide protection from UV rays. Langerhan cells also in this layer are an important component of the immunologic barrier of the skin
Epidermis
Contains blood vessels, nerves, and appendages (sweat glands, sebaceous glands, hair follicles, nails).
Dermis
Why do the blood vessels in the dermis consist of two horizontal plexuses one on top of the other?
Allows shunting of blood either toward the skin to cool or away from the skin to stay warm
Helps insulate against the cold and serves as a reserve food source
Subcutaneous tissues
Technically a flat area of discolored skin less than a cm in diameter.
Macule
Examples of a macule.
Examples of a large macule
Macule = freckle or cherry angioma
Large macule = patches, marks, spots, plaques, nevi, age spots, vitiligo, or port wine stains
A solid elevation of skin less than 1 cm in diameter.
Papule
Examples of papules
Examples of large papules
Papules = moles, warts, or skin tags
Large papules = nodules, tumors, lipomas, cysts, other masses
Small, fluid filled elevation of the skin
Vesicle
Examples of vesicles
Examples of large vesicles
Vesicles = herpes simplex, chicken pox, or herpes zoster
Large vesicles = Bullae (blisters)
A small pus filled elevation of the skin
Pustule
Examples of pustules
Examples of large pustules
Pustule = pimples
Large pustules = abscesses, furuncles, and carbuncles
Flaky skin, keratinized cells. Ex: dandruff, seborrhea, psoriasis
Scales
Dried serum, blood or purulent exudates. Ex: weeping eczema
Crust
Rough, thickened epidermis with accentuated skin markings. Ex: chronic dermatitis
Lichenification
Fine, irregular, superficial capillary dilations. Ex: Rosacea
Telangiectasis
Linear, crusted loss of epidermis/dermis. Ex: Abrasion or scratch
Excoriation
Loss of some epidermis. Ex: Sun damaged skin
Erosion
Linear crack extending into the dermis. Ex: Athletes foot
Fissure
Skin concavity involving the epidermis and dermis. Ex: Bed sores
Ulcer
Acute skin eruption that is a new localized rash due to direct skin contact with an irritant or allergen is most likely caused by this. Ex: poison ivy, household or industrial irritants
Contact reations
Acute skin eruption that causes an often itchy, red, maculopapular skin eruptions over a large portion of the body. May be associated with prescriptions, vitamins, supplements, etc.
Adverse drug reaction
Condition that presents with a nonpruritic rash to the palms, soles, mouth, or genitals. May also see white mucus patches, flat-topped, moist genital warts, and spotty alopecia of the scalp
Secondary syphilis
The primary lesion of syphilis. Painless ulceration, difficult to heal, and usually disappears prior to the rash associated with secondary syphilis
Chancre
Skin presentations associated with tertiary syphilis
Gummas
Ulceration
Who is at the greatest risk of developing skin cancer?
Light skinned people who are outside a lot, have a family history of skin cancer, and have a history of a severe sunburn
ABCDE’s of skin cancer
A- Asymmetry B- Border C- Color D- Diameter E- Evolution
Epithelial cell tumor that begins as a papule and enlarges peripherally. Metastasis is rare and therefore the least worry some
Basal cell carcinoma
A slow growing, malignant tumor of squamous epithelium. Common to the skin and lungs, but found elsewhere.
Squamous cell carcinoma
A malignant neoplasm originating in the skin. Small percentage of all skin cancers, but by far the most severe
Melanoma
A malignant multifocal neoplasm beginning as soft brown or purplish papules on the feet. Associated with AIDS, diabetes, and malignant lymphoma
Kaposi’s Sarcoma
Typical balding pattern
Males begins as early as 20 starting in the frontotemporal and vertex areas and may end with a rim of hair remaining in the lateral and posterior scalp
Uncommon for females until 60
Idiopathic disease resulting in atypical patches of hair loss. Self limiting.
Alopecia areata
Alopecia that is less common and results in permanent hair loss on the scalp
Alopecia totalis
Very rare alopecia causes widespread loss of all body hair
Alopecia universalis