Macule
Circumscribed, flat change in color of skin; <1.0 cm diameter
Patch
Circumscribed, flat lesion (large macule); >1.0 cm diameter
Papule
Raised sold lesion; <0.5 cm diameter. Papules may become confluent and form plaque
Plaque
Circumscribed, raised superficial lesion with flat surface; >0.5 cm diameter
Nodule
Circumscribed, raised, firm lesion; >0.5 cm; may have started as a papule
Wheal
Firm, raised, pink/red swelling of the skin; size and shape varies; usually itchy; lasts <24 hours; hives
Tumor
Large papule or nodule; usually >1 cm diameter
Pustule
Circumscribed, raised lesion containing purulent exudate that may be cloudy, white, yellow, or hemorrhagic; size varies
Vesicle
Circumscribed, raised lesion; filled with serous liquid or semi-solid material; may become infected; blister
Bulla
Vesicle > 0.5 cm
Cyst
Firm, raised encapsulated lesion; filled with liquid or semi-solid material; may become infected
Erosion
all or part of epidermis is lost. heals WITHOUT scarring (dermis not involved)
Ulcer
hole in skin: loss of full thickness of epidermis + part/all of dermis. heals WITH scarring
Excoriation
linear erosion from scratching
Fissure
crack/split in skin
Scale
thick stratum corneum
Crust
scab: dried stuff
Atrophy
thinning of skin. generalized: physiologic aging; or localized: stretch marks
Lichenification
thickening of skin, exaggeration of normal skin markings, results from repeated rubbing or scratching
Macerated
water logged skin, swollen and soft
Annular
ring-shaped
Serpiginous
wandering or twisting, like a snake
Dermatomal
lesions in a dermatome: shingles!
Exophytic
protruding from the skin
Keratotic
thickening of the skin and horny layer (dry heaped up, hard skin)
Pedunculated
a narrow, stalk-like attachment to the skin (skin tags)
Psoriasiform
resembling psoriasis
Varicelliform
resembling chicken pox
Verrucous
wartlike
Annulare
peripheral circular curving
Atrophic
thinning of the skin
Hyper/hypo
pigmented - increase/decrease of pigment
Depigmented
LOSS of pigment (vitiligo)
Violaceous
reddish purple
Morbilliform
measles like" eruption, symmetric macular <1cm macules or smaller that become confluent (viral exanthems)