Derm Terms Flashcards
Patch
large macule (>1cm) or a coalescence of macules (vitiligo)
-Macule= freckle
Macule
Freckle
-flat, circumscribed region with different color or texture
Papule
palpable (able to touch), circumscribed change in consistency or contour of the skin
ex: acne
Nodule
papule > 1 cm in diameter
Tumor
large nodule (large papule)
Papule<Tumor
Ex: lymphoma
Plaque
a coalescence of papules
ex: psoriasis
Cyst
encapsulated nodule (large papule) filled with soft material
ex: epidermal cyst
Vesicle
circumscribed, clear, fluid-filled lesion
–> BLISTER
Ex: herpes simplex
Bulla
large vesicle (blister)
Ex: bullous pemphigoid
Pustule
A vesicle (blister) filled with inflammatory cells
Ex: acne vulgaris
–> Neutrophils= pus
Wheal
a palpable, circumscribed, area of edema with central pallor and peripheral erythema (red) that usually disappear quickly (1. edema 2. erythemia)
Ex: hives
Purpura
discoloration of the skin due to the presence of blood in the tissue, outside of blood vessels; will not blanch with pressure unlike wheals
ex: vasculitis
Petechiae
a punctate(studded with tiny dots) region of purpura (tiny dots)
Comedo
a plug within a hair follilcle canal which is composed of keratin and sebum = blackhead
ex: acne vulgaris
Milium
A white papule composed of whorls of keratinized epidermal cells beneath the skin surface
(probs skip this one… it’s just white dots)
Burrow
horizontal tunnel in the stratum corneum produced by a parasite
Ex: scabies
Scaly
exfoliation of surface keratin cells
ex: psoriasis
Hyperkeratotic
having very thick scale
ex: icthyosis
Crusted
displaying dried exudate of fluid and/or cellular components on the skin