Skin Flashcards
outermost layer of skin
epidermis
deep layer of skin made of dense connective tissue, containing capillaries, glands, nerve fibers, hair follicles
dermis
one of the most rapidly dividing cells in the body, hold hair root
hair follicle
glands that open directly to skin surface, regulate body temperaturew
eccrine glands
found in axilla, nipples, anogenital area, eyelids and external ears, associated with hair follicles
apocrine sweat glands
surround and lubricate hair follicles
sebaceous glands
layer of fatty CT; thermal regulator, protects bony prominences
subcutaneous tissue
epidermal cells converted to hard plates of keratin
nails
skin tension lines created by collagen
Langer’s lines
ABCDE on melanoma
Asymmetry Border irregularity Color variation Diameter > 6mm Evolving
benign lesions on sun exposed areas
seborrheic keratosis
nonblanchable skin markings
purpura, petechiae, eccymosis
flat, circumscribed area
macule
elevated, firm, circumscribed
papule
flat, nonpalpable, irregularly shaped macule >1cm
patch
elevated, firm, rough lesion with flat top surface >1 cm
plaque
elevated, irregular shaped cutaneous edema, solid, transient diameter
wheal
fine, irregular, red lines; permanently dilated small blood vessels, venules, capillaries, and arterioles
telangiectasia
elevated, firm circumscribed lesion extends deeper into dermis than a papule; 1-2 cm
nodule
elevated solid lesion, deep in dermis, >2 cm
tumor
elevated circumscribed, superficial, filled with serous fluid,
vesicle
vesicle >1 cm
bulla
elevated superficial lesion filled with purulent fluid
pustule
elevated, circumscribed, encapsulated lesion in either dermis or epidermis; filled with liquid or semisolid material
cyst
keratinized cells, flaky skin, irregular, thick or thin; dry or oily; varies in size
scale
rough, thickened epidermis secondary to persistent rubbing, itching, or irritation
lichenification
irregularly shaped, elevated, progressively enlarging scar due to collagen formation
keloid