Pediatric First Aid: Dermatologic Disease

Question 1

Macule vs Patch

Answer 1

both are flat and nonpalpable

M = < 1 cm skin discoloration
P = > 1 cm skin discoloration

Question 2

Plaque vs Wheal

Answer 2

P = elevated, flat-topped, > 1 cm diameter

W = elevated, round, flat-topped dermal edema
- disappears within hours

Question 3

Vesicle vs Bulla

Answer 3

both elevated, circumscribed, fluid-filled

V = < 1 cm diameter
B = > 1 cm diameter

Question 4

Pustule

Answer 4

circumscribed, elevated, puss-filled

Question 5

Papule vs Nodule

Answer 5

both elevated, palpable, solid

P = < 1 cm diameter
N = > 1 cm diameter

Question 6

Petechiae

Answer 6

red-purple, nonblanching macule; pinpoint

• caused by extravasated RBCs

Question 7

Purpura

Answer 7

red-purple, nonblanching macule; NOT pinpoint

• caused by extravasated RBCs

Question 8

Telangiectasia

Answer 8

blanchable, dilated blood vessels