-
macule
- primary flat
- flat pigmented, circumscribed area less than 1cm in diameter
- ex: freckle, flat morel, rubella rash
-
papule
- primary solid elevated
- solid, elevated lesion less that 1 cm in diameter that may be the same color as the skin or pigment
- ex: nevus, wart, pimple, ringworm, psoriasis, eczema
-
nodule
- primary solid elevated
- palpable, circumscribed lesion; larger and deeper than a papule (0.6- 2 cm in diameter), extends into the dermal layer
- ex: intradermal nevus, benign or malignant tumor
-
tumor
- primary solid elevated
- solid, elevated lesion larger than 2cm in diameter that extends into the dermal and subcutaneous layers
- ex: lipoma, steatoma, dermatofibroma, hemangioma
-
wheal
- primary solid elevated
- elevated, firm, rounded lesion with localized skin edema that varies in size, shape, and color; paler in the center than its surrounded by edges; accompanied by itching
- ex: hives, insect bites, urticaria
-
vesicle
- primary fluid filled elevated
- elevated, circumscribed, fluid filled lesion less that 0.5 cm in diameter
- ex: poison ivy, shingles, chicken pox
-
pustule
- primary fluid filled elevated
- small, raised, circumscribed lesion that contains pus; usually less than 1cm in diameter
- ex: acne, furuncle, pustular psoriasis, scabies
-
bulla
- primary fluid filled elevated
- a vesicle or blister larger than 1 cm in diameter
- ex: 2nd degree burns, sever poison oak, poison ivy
-
excoriations
- secondary depressed
- linear scratch marks or traumatized abrasions of the epidermis
- ex: scratches, abrasions, chemical or thermal burns
-
fissure
- secondary depressed
- small slit or cracklike sore that extends into the dermal layer; could be caused by continuous inflammation and drying
-
ulcer
- secondary depressed
- an open sore or lesion that extends to the dermis and usually heals with scarring
- ex: pressure sore, basal cell carcinoma
-
depressed lesion
caused by loss of skin
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