Derm Terms Flashcards
Scale
accumulation of cornified cells; can vary in consistency & color
Crust
composed of dried exudate, blood, pus, serum, scales
Alopecia
hair loss
Comedo
dilated hair follicle filled with cells & sebaceous secretions
Hyperpigmentation
due to increased melanin within epidermis +/- dermis
Hypopigmentation
loss of epidermal melanin
Macule
non-raised, circumscribed, area of discoloration that is up to 1 cm in diameter
Patch
similar to macule, but larger than 1 cm
Papule
solid erythematous elevation in the skin up to 1 cm in diameter
Plaque
flat-topped elevation in the skin, larger than a papule
Nodule
small, circumscribed elevation >1cm in diameter that extends into dermis or below
Tumor
mass of varying size that can involve any layer of the skin and/or subcutaneous tissue
Pustule
small, circumscribed elevation within epidermis filled with pus; often preceded by a papule
Abscess
accumulation of pus within dermis or subcutaneous tissue; lesion often fluctuant, but can be firm
Vesicle
elevation of the epidermis filled with clear fluid that is up to 1 cm in diameter
Bulla
vesicle larger than 1 cm in diameter
Cyst
cavity filled with either fluid or solid material, lined by epithelium
Wheal
circumscribed, edematous raised lesion
Epidermal collarette
circular ridge of scale that represents the remnants of a pustule, papule, vesicle or bulla that has regressed
Scar
area of fibrous tissue at site of previous trauma or lesion; often alopecic and depigmented
Erosion
superficial lesion within epidermis that does not penetrate into the dermis
Ulcer
deep lesion through epidermis extending into dermis
Fissure
linear lesion (crack) into or through epidermis
Excoriation
self-inflicted lesion (scratching, biting, rubbing) causing removal of epidermis
Lichenification
thickening and hardening of the skin causing exaggerated skin markings; associated with chronic inflammation or trauma
Hyperkeratosis
thickened horny layer of epidermis; ie. callus
