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29 terms

Chapter 6 skin, hair and nails cont.

definitions of skin lesions
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psoriasis
chronic, recurrent dermatosis marked by itchy, scaly, red plaques covered by silvery gray scales
atopic eczema
This rash appears mainly on the flexor surfaces of the skin.
What are the three layers of skin?
Epidermis, dermis, connective tissue
cluster skin lesion pattern
grouped lesions of herpes simplex
serpiginous skin lesion pattern
tinea corporis, appears in snake like pattern
annular, arciform skin lesion pattern
ringworm
macule
small flat spot, upt ot 1.0 cm
patch
flat spots, 1.0 cm or larger
examples of macules
vitiligo, and hemangioma
plaque
elevated superficial lesion 1.0 cm or larger, often formed by coalescensce of papules, example psoriasisi
papule
up to 1.0 cm
nodule
marble-like lesion larger than 0.5 cm, oftern deeper and firmer than a papule
cyst
sac of fluid or semisolid material located in or under the skin
wheal
Elevated irregular shaped area of cutaneous edema ex. insect bites & allergic reactions.
vesicle
papavle elevations with fluid filled cavities. Up to 1.0 cm examples are herpes zoster and simplex
bulla
1.0 cm or larger; filled with serous fluid
examples are insect bites
pustule
filled with pus examples are acne and small pox
burrow
a minute, slightly raised tunnel in the epidermis. example are scabies
scale
a thin flake of dead exfoliated epidermis example echthyosis vulgaris and dry skin
crust
dried residue of skin exudates such as serum, pus or blood. example impetigo
scars
connective tissue that arises from injury or disease
Keloids
Hypertrophic scarring that extends beyond the borders of the initiating injury. ex: keloid- ear lobe
erosions
nonscarring loss of the superficial epidermis; surface is moist but does not bleed
excoriation
Skin sore or abrasion produced by scratching or scraping. example cat scratching
fissure
a linear crack in the skin, often resulting form excessive dryness. example athletes foot
ulcer
a deeper loss of epidermis and dermis; may bleed and scar
What is the most common cutaneous disorder in US?
Acne vulgaris
Melanoma risk factors.
severe sunburn as child, fair skin that freckle or burns easily, year round sun exposure, family hx.
nevi
common mole