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25 Cards in this Set

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The Basic Scheme for the Dermatologic Exam
Morphology of the primary lesion
Configuration
Distribution
Morphologic diagnostic categories
Macule/patch
A discolored spot on the skin that is neither elevated nor depressed when compared to the surrounding skin.

A large macule is called a patch.
Papule/plaque
A small circumscribed, solid elevation of the skin.

If a papule enlarges laterally or a group of papules enlarge and coalesce, the resulting lesion is a plaque.
Nodule/tumor
A small rounded lump which is solid and can be detected by touch.

A large nodule is called a tumor.
Cyst
A sac containing liquid or semisolid material is a cyst.
Vesicle/bulla
A small circumscribed elevation of the epidermis containing fluid

A large vesicle is called a bulla
Pustule
A small elevation of the skin filled with pus
SPECIAL PRIMARY LESIONS
Wheal
Target lesion
Burrow
Telangiectasis (telangiectases)
Milium (milia)
Comedo (comedones)
Wheal
PPD, hives, cold urticaria
Target lesion
lyme disease, erythema multiformans
Burrow
scabies
Telangiectasis (telangiectases)
dilated superficial blood vessels--osler-weber-rendu
Milium (milia)
small superficial cysts
Comedo (comedones)
open-zit
closed blackhead
Morphology: Secondary Changes
Scale, desquamation
Crust
Excoriation
Erosion
Ulceration
Fissure
Scar (cicatrix)
Atrophy
Lichenification
Induration
Pigmentary changes
Vascular changes
Excoriation
evidence of scratching
Erosion
excessive scratching that takes off the top layers of epidermis--NO SCAR
Ulceration
Damage to the dermis--SCAR
Lichenification
callous-thickened skin due to repeated friction against the epidermis
Induration
raised lesion involving more than the epidermis
BLANCHING
Erythema
NON-BLANCHING
Purpura / hemorrhage (petechia,
pl. petechiae ---> ecchymosis,
pl. ecchymoses)
Configuration
Solitary vs multiple
Discrete, grouped lesions
Agminated (clustered)
Herpetiform
Zosteriform-dermatomal
Guttate
Confluent lesions
Linear-poison ivy
Serpiginous
Annular/circinate
Gyrate/figurate