| Term | Definition |
|
Macule |
circumscribed flat area of skin, different in color or texture from its surrounding tissue |
|
Patch |
A large non raised lesion, more than .5 cm in diameter |
|
wheal |
An elevated white or pink compressible, evanescent raised lesion produced by dermal edema |
|
Tumor |
an enlargement of the tissues by normal or pathologic material or cells that form a mass |
|
Nodule |
is a solid mass of the skin which can be observed as an elevation or can be palpated |
|
Plaque |
An elevated area of skin more than .5 cm in diameter with a relatively broad flat surface which appears like a plateau in cross-section |
|
Papule |
a small solid elevation of the skin |
|
Vesicle |
circumscribed elevation of the skin less than 0.5 cm in diameter and containing a liquid |
|
bulla |
a circumscribed elevation of skin of 0.5 cm or more in diameter containing a liquid |
|
Pustule |
A visible accumulation of pus in the skin |
|
Erosion |
loss of the epidermis which heals without scarring |
|
ulcer |
defect or loss of dermis and epidermis produced by sloughing of necrotic tissue |
|
Fissure |
linear gap or slit in the skin surface |
|
Crust |
is an outer layer from the drying of exudate, secretion, or hemorrhage |
|
Scale |
is a flat plate or flake of stratum corneum |
|
LICHENIFICATION |
chronic thickening of the epidermis with exaggeration of its normal markings, often as a result of (chronic) scratching or rubbing. |
|
ATROPHY |
diminution of a tissue |
|
STRIAE |
streak or band of linear, atrophic, pink, purple or white lesions of the skin due to changes in connective tissue |
|
EXCORIATION |
is any loss of substance of skin produced by scratching |
|
SCAR |
fibrous tissue replacing normal tissues destroyed by injury or disease |
|
BURROW |
cuniculus, passage, or tunnel in the skin that houses a metazoal parasite, particularly the acarus of scabies |
|
COMEDO |
is a plug of keratin and sebum in a dilated pilosebaceous orifice |
|
Telangiectasia |
are small dilated blood vessels near the surface of the skin |
|
PETECHIAE |
punctate hemorrhagic spot less than 2 mm in diameter |
|
NEVUS |
sharply-circumscribed and chronic lesions of the skin, mole |