Intro to Dermatology Flashcards
Macule
Color change of skin, completley flat, can be any size
Papule vs plaque
Papule: raised bump less than 1 cm
Plaque: raised bump greater than 1 cm
Pustule
Pus-containing blister
Wheal
Soft, edematous dermal lesion (arises in dermis)
Bulla vs vesicle
Bulla: blister less than 1 cm
Vesicle: blister greater than 1 cm
Nodule
Spherical lesion (can arise from dermis, epidermis, or subcutaneous layer)
Erosion
Loss of epidermis that heals without a scar
Ulcer
Loss of epidermis and part of the dermis that heals with a scar
Lichenification
Thickening of skin (usually secondary to scratching)
Crust
Scab (dried bodily fluid)
Atrophy
Thinning of skin (can be epidermis or epidermis + dermis)
Fissure
Linear ulcer (crack in skin)
Scale
Thickened stratum corneum
Purpura
Non-blanchable, purple, due to extravasaion of RBCs
Annular
Ring of lesions
Serpiginous
Lesions look like they are twisting and wandering around like a snake
Herpetiform
Lesions are clustered together (like the way reactive shingles would be)
Acral
Lesions on distal portions of limbs and head
Flexural
Lesions are on major body fold (like cubital or popliteal fossa)
Telangiectasias
Small, superficial blood vessels that become visible because they are dilated
Petechiae vs purpura
Both nonblanching discoleration of skin due to blood that has extravasated outside vessel walls
Comedone
Darkened plug of sebum and karatin that occludes pilosebaceous follicle (blackhead/whitehead)
Burrows
Linear or serpiginous tunnels within epidermis
