-
Macule
- Flat, usually circumscribed, non palpable color change of the skin
- Freckles
- lentigo
- tattoo
- cafe au lait spot
-
Patch
- a coalescence of macules or a large macule
- Vitiligo
-
Papule
- A palpable, circumscribed change in the consistency or contour of the skin. A papule may be elevated, depressed or level with the skin surface.
- Wart
- Lichen planus
- acne vulgaris
- psoriasis
-
Nodule
- A papule larger than 1 cm in diameter
- melanoma
- rheumatoid nodule
-
-
palaque
- a coalescence of papules
- lichen plantus
-
vesicle
- A circumscribed, clear, fluid-filled lesion of the skin, i.e. a small blister
- herpes simplex (cold sore)
- herpes zoster (shingles)
-
Bulla
- a large vesicle
- bullous pemphigoid
- pemphigus vulgaris
-
pustule
- a vesicle filled with inflammatory cells
- pustular psoriasis
- acne vulgaris
- folliculitis
-
wheal
- a palpaple, circumscribed, usually evanescent swelling caused by edema. the lesion usually demonstrates central pallor and peripheral erythema (redness).
- Hives (urticaria)
-
Pupura
- discoloration of the skin due to the presence of blood in the tissue, outside of blood vessels. color will not blanch with pressure (c.f. erythema).
- vasculitis
- trauma
- platelet deficiency
-
petechia
a punctate lesion of purpura
-
hematoma
a moderate-sized mass of pupura
-
ecchymosis
a large area of purpura
-
comedo
- a plug within a hair follicle canal that is composed of keratin and sebum, i.e. a blackhead
- acne vulgaris
-
milium
- a white papule composed of whorls of keratinized epidermal cells beneath the skin surface, i.e. a whitehead
- acne vulgaris
- scars
-
burrow
- a horizontal tunnel in the stratum corneum produced by the female mite
- scabies
-
scale (squame)
- an exfoliation of surface keratine cells
- dermatitis
- lichen planus
- ichthyosis
-
crust
- dried exudate of fluid and/or cellular elements on the skin surface
- infection
- ulcers
-
erosion
- a superficial defect in the skin surface which does not penetrate though the epidermis
- scratch
- abrasion
- excoriation
-
ulcer
- a defect in the skin surface which penetrates through the epidermis to the dermis
- leg ulcers
- trauma
- chance of syphilic
-
excoriation
an erosion or uleration, usually linear, due to scratching
-
fissure
- a horizontal split in the skin
- dry skin
- surgical incision
-
erythema
- a diffuse reddening of the skin due to vasodilation with increased blood flow. color will blanch with pressure (c.f. purpura)
- toxic erythema
- systemic lupus erythematosus
-
edema
- a diffuse swelling of the skin due to extravasation of serum and lymph into tissue (c.f. wheal)
- acute dermatitis
-
pigmentation
usually refers to the state of skin color due to melanin pigment
-
hyperpigmentation
- darkening due to the increased amount of melanin
- lichen planus
-
hypopigmentation
- lightening due to decreased amount of melanin
- vitiligo
-
lichenification
- thickening of the skin with accentuation of the normal skin markings. usually a sign of chronicity, associated with scratching or rubbing
- atopic dermatitis
-
verrucous
- surface characterized by velvety, roughened wart-like change
- verrucal vulgaris (wart)
-
telangiectasia
- condition of dilated small arterial or capillary blood vessels coursing parallel to the skin surface
- rosacea
- vasular spider
-
atrophy
- an emaciation, thinning or wasting of tissue
- topical steroids
- aging
-
scar
- result of replacement of normal tissue iwht fibrous connective tissue. the dermis must be injured fora scar to develop.
- scar
- keloid
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