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Glossary of Derm, terminology

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define a macule
1. flat discoloration
2. <1 cm in diameter
define a papule
1. elevated skin lesion
2. <1 cm in diameter
define a plaque
1. elevated skin lesion
2. >1 cm in diameter
define a vesicle
1. small fluid-containing lesion
2. <0.5 cm in diameter
define a wheal
1. like a vesicle but occurs transiently
2. as in urticaria (hives)
define a bulla
1. large fluid-containing lesion
2. >0.5 cm in diameter
what is lichenification?
1. accentuated skin markings in thick epidermis
2. as a result of scratching
what is a keloid?
1. irregular raised lesion
2. resulting from scar tissue hypertrophy
what is petechiae?
1. flat, pinhead, nonblanching
2. red-purple lesion caused by hemorrhage into the skin
3. seen in any cause of thrombocytopenia
what is purpura?
1. larger than petechiae
2. nonblanching, red-purple lesion caused by hemorrhage into the skin
what is a cyst?
1. closed epithelium-lined cavity or sac
2. containing liquid or semisolid material
what is hyperkeratosis?
1. increased thickness of stratum corneum
2. seen in chronic dermatitis
what is parakeratosis?
1. hyperkeratosis c/ retention of nuclei in stratum corneum
2. with thinning of stratum granulosum
3. usually seen in psoriasis
what lesion is:
cafe-au-lait
vitiligo
freckle
junctional nevi
ink tattoo?
macule
what lesion is:
acrocordon (skin tag)
basal cell carcinoma
molluscum contagiosum
intradermal nevi
lichen planus
papule
what lesions is:
bowen's disease
mycosis fungoides
psoriasis
eczema
tinea corporis
plaque
what lesion includes:
nevus flammeus
vitiligo
patch
what lesion includes:
rheumatoid nodule
tendon xanthoma
erythema nodosum
lipoma
metastatic carcinoma
nodule
1. elevated, solid lesion
2. >0.5 cm in diameter
3. larger, deeper papule
what lesion includes:
urticaria
dermographism
urticaria pigmentoas
wheal
what lesion includes:
herpes simplex
herpes zoster
dyshidrotic eczema
contact dermatitis
vesicle
1. papule that contains clear fluid
2. a blister
what lesion includes:
pemphigus vulgaris
bullous pemphigoid
bullous impetigo
bulla
1. localized fluid collection
2. >0.5 cm in diameter
3. a large vesicle
what lesion includes:
folliculitis
impetigo
ance
pustular psoriasis
pustule
what lesion includes:
acne
epidermoid cyst
pilar cyst
cyst

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