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Dermatology definitions
Learn descriptive terms to describe skin conditions
34
Medical
Undergraduate 3
10/27/2011

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Term
Bulla
Definition
A large fluid filled lesion >0.5cm
Term
Butterfly pattern
Definition
Distributed on nose and cheeks
Term
Central clearing
Definition
A rash that has a normal central area
Term
Cheloid/ Keloid
Definition
A very raised, erythematous scar
Term
Comedone
Definition
Blackhead
Term
Erosion
Definition
An area of skin denunded by partial or complete loss of the epidermis
Term
Erythroderma
Definition
A rash involving at least 90% of the skin surface
Term
Eschar
Definition
A thick crust over an ulcer or erosion
Term
Excoriation
Definition
a superficial loss of epidermis from scratching or picking, therefore often linear and often covered by crust 
Term
Hyperkeratotic
Definition
covered in thick scale
Term
Impetiginised
Definition
Covered in crust, pustules often weeping
Term
Indurated
Definition
Firm
Term
Lichenification
Definition
Thickening of the epidermis usually due to friction
Term
Livedo
Definition
A purple, lace-like or reticulated lesion usually on the lower legs
Term
Localised
Definition
Limited to one area
Term
Macule
Definition
A small, flat lesion
Term
Micropapule
Definition

A raised lesion less than 1-2mm in diameter

 

Term
Nodule
Definition
A solid lesion >0.5cm in width and depth
Term
Patch
Definition
A large, flat lesion
Term
Palpable purpura
Definition
a purpuric lesion which is palpable above the surface of the skin
Term
Papule
Definition
A small raised lesion
Term
Plaque
Definition
A large raised lesion >2cm in diameter but without depth
Term
Pustule
Definition
a visible collection of pus <0.5cm in the skin
Term
Abcess
Definition
collection of pus in a cavit >1cm in diameter
Term
Ulcer
Definition
an area of skin where the wholeof the epidermis and at least part of the dermis has been lost
Term
Scar
Definition
A pale, firm or depressed lesion resulting from injury
Term
Scaly
Definition
covered in flakes
Term
Sclerotic
Definition
scar like
Term
Targetoid
Definition
Rash that looks like a bulls eye
Term
Telangiectasis
Definition
an erythematous, fine linear lesion composed of capillaries produced by telangiectasia  
Term
Verrucous
Definition
very hyperkeratoic, similar to a wart
Term
Vesicle
Definition
circumscribed elevation of skin <0.5mm and containing clear fluid
Term
Ecchymosis
Definition
Large extravastations of blood into the skin
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