Intro to Dermatology

Question 1

Macule

Answer 1

Color change of skin, completley flat, can be any size

Question 2

Papule vs plaque

Answer 2

Papule: raised bump less than 1 cm

Plaque: raised bump greater than 1 cm

Question 3

Pustule

Answer 3

Pus-containing blister

Question 4

Wheal

Answer 4

Soft, edematous dermal lesion (arises in dermis)

Question 5

Bulla vs vesicle

Answer 5

Bulla: blister less than 1 cm

Vesicle: blister greater than 1 cm

Question 6

Nodule

Answer 6

Spherical lesion (can arise from dermis, epidermis, or subcutaneous layer)

Question 7

Erosion

Answer 7

Loss of epidermis that heals without a scar

Question 8

Ulcer

Answer 8

Loss of epidermis and part of the dermis that heals with a scar

Question 9

Lichenification

Answer 9

Thickening of skin (usually secondary to scratching)

Question 10

Crust

Answer 10

Scab (dried bodily fluid)

Question 11

Atrophy

Answer 11

Thinning of skin (can be epidermis or epidermis + dermis)

Question 12

Fissure

Answer 12

Linear ulcer (crack in skin)

Question 13

Scale

Answer 13

Thickened stratum corneum

Question 14

Purpura

Answer 14

Non-blanchable, purple, due to extravasaion of RBCs

Question 15

Annular

Answer 15

Ring of lesions

Question 16

Serpiginous

Answer 16

Lesions look like they are twisting and wandering around like a snake

Question 17

Herpetiform

Answer 17

Lesions are clustered together (like the way reactive shingles would be)

Question 18

Acral

Answer 18

Lesions on distal portions of limbs and head

Question 19

Flexural

Answer 19

Lesions are on major body fold (like cubital or popliteal fossa)

Question 20

Telangiectasias

Answer 20

Small, superficial blood vessels that become visible because they are dilated

Question 21

Petechiae vs purpura

Answer 21

Both nonblanching discoleration of skin due to blood that has extravasated outside vessel walls

Question 22

Comedone

Answer 22

Darkened plug of sebum and karatin that occludes pilosebaceous follicle (blackhead/whitehead)

Question 23

Burrows

Answer 23

Linear or serpiginous tunnels within epidermis