Terminology Flashcards
Define macule
flat area of colour change
often due to pigmentary change
Define papule
solid raised lesion <0.5cm diameter
Define nodule
solid raised lesion >0.5cm diameter
Define plaque
palpable scaling raised lesion
diameter greater than height
Define vesicle
raised, clear, fluid-filled lesion <0.5cm diameter
within or beneath epidermis
Define bulla
raised, clear, fluid-filled lesion >0.5cm diameter
Define pustule
vesicle with pus
Define wheal
cutaneous oedema
Define lichenification
well-defined roughening of skin with accentuation of skin markings
Define erythema
redness that blanches on pressure
Define Koebner’s phenomenon
appearance of new skin lesions on previously unaffected skin secondary to trauma
Define abscess
localised accumulation of pus
Define striae
stretch marks
Define fissure
split in epidermis extending to dermis
Define generalised
all over body
Define widespread
extensive
Define localised
restricted to one area of body
Define flexural
body folds eg. groin, neck, antecubital fossa
List some extensor surfaces
knees, elbows, shins etc.
List some pressure areas
sacrum, buttocks, ankles, heels
Define dermatomal
area of skin supplied by a single spinal nerve
Define photosensitive
affects sun-exposed areas eg. face, neck, back of hands
Define discrete
individual lesions separate from each other
Define confluent
merging together
Define linear
in a line
Define cluster
grouped together
Define target
concentric rings (eg. erythema multiforme)
Define annular
like a ring or circle
Define discoid
coin-shaped
Define serpiginous
like a snake
Define reticulate
like a net (eg. livedo reticularis)
Define stellate
star-like (eg. healing leg ulcer)
Define purpura
red or purple colour which does not blanch
- petechiae (pinpoint)
- ecchymoses (bruise like patches)
Define hypopigmentation
paler skin (eg. pityriasis)
Define depigmentation
absence of melanin
Define hyperpigmentation
darker skin (eg. melasma)
Define patch
larger flat area of altered colour or texture
Define cyst
circumscribed tumour
containing semi-solid or liquid material
Define well-demarcated
clear border
Define erosion and ulcer
erosion = loss of epidermis
ulcer = loss of epidermis and dermis
Define excoriation
loss of epidermis induced by scratching
Define scale
flaking from epidermis
Define crust
collection of inflammatory cells and serum on the surface (eg. golden crust in impetigo)
SCAM mnemonic for describing a lesion
S = size, shape
C = colour
A = associated secondary change
M = morphology, margin (border)
Define keratotic
collection of dead skin cells
ABCDE mnemonic for pigmented lesions
A = asymmetry
B = border (irregular)
C = colour (2 or more)
D = diameter (>6mm)
E = evolution