Derminology

Question 1

Primary skin lesion

Answer 1

physical alteration of skin considered to be caused directly by disease process

Question 2

Macule

Answer 2

circumscribed, flat discoloration

Question 3

Patch

Answer 3

circumscribed, flat discoloration >0.5 cm

Question 4

Papule

Answer 4

domed, raised lesion

Question 5

Pustule

Answer 5

domed papule containing pus

Question 6

Nodule

Answer 6

domed, raised lesion >0.5 cm

Question 7

Plaque

Answer 7

raised, flat-topped lesion >0.5 cm

Question 8

Vesicle

Answer 8

papule containing fluid

Question 9

Bulla

Answer 9

nodule containing fluid >0.5 cm

Question 10

Wheal

Answer 10

edematous, transient plaque

Question 11

Secondary findings

Answer 11

changes due to external factors such as scratching, trauma, infection, or changes caused by healing

Question 12

Scale

Answer 12

thickening of stratum corneum

• adherent
• hyperkeratotic (thick, white scale)
• fine, white
• yellow, greasy

Question 13

Crust

Answer 13

dried endogenous material on the skin

• serous crust (dried serum)
• hemorrhagic crust (dried blood)

Question 14

Erosion

Answer 14

loss of epidermis

Question 15

Ulcer

Answer 15

loss of epidermis and dermis

Question 16

Excoriation

Answer 16

linear erosion from scratching

Question 17

Fissure

Answer 17

linear ulceration

Question 18

Lichenification

Answer 18

thickening of skin with accentuation of skin markings due to chronic scratching or rubbing

Question 19

Atrophy

Answer 19

thinning of epidermis, dermis and/or subcutaneous fat

Question 20

Scar

Answer 20

thickened, fibrous tissue

Question 21

Purpura

Answer 21

lesions caused by extravasated RBCs

Question 22

Petechiae

Answer 22

pinpoint red-brown macules

Question 23

Ecchymosis

Answer 23

bruise (hematoma)

Question 24

Palpable purpura

Answer 24

most commonly caused by vasculitis