Chapter 6 skin, hair and nails cont.
definitions of skin lesions
chronic, recurrent dermatosis marked by itchy, scaly, red plaques covered by silvery gray scales
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
small flat spot, upt ot 1.0 cm
flat spots, 1.0 cm or larger
examples of macules
vitiligo, and hemangioma
elevated superficial lesion 1.0 cm or larger, often formed by coalescensce of papules, example psoriasisi
up to 1.0 cm
marble-like lesion larger than 0.5 cm, oftern deeper and firmer than a papule
sac of fluid or semisolid material located in or under the skin
Elevated irregular shaped area of cutaneous edema ex. insect bites & allergic reactions.
papavle elevations with fluid filled cavities. Up to 1.0 cm examples are herpes zoster and simplex
1.0 cm or larger; filled with serous fluid
examples are insect bites
filled with pus examples are acne and small pox
a minute, slightly raised tunnel in the epidermis. example are scabies
a thin flake of dead exfoliated epidermis example echthyosis vulgaris and dry skin
dried residue of skin exudates such as serum, pus or blood. example impetigo
connective tissue that arises from injury or disease
Hypertrophic scarring that extends beyond the borders of the initiating injury. ex: keloid- ear lobe
nonscarring loss of the superficial epidermis; surface is moist but does not bleed
Skin sore or abrasion produced by scratching or scraping. example cat scratching
a linear crack in the skin, often resulting form excessive dryness. example athletes foot
a deeper loss of epidermis and dermis; may bleed and scar
What is the most common cutaneous disorder in US?
Melanoma risk factors.
severe sunburn as child, fair skin that freckle or burns easily, year round sun exposure, family hx.