Dermatology

Question 1

Macule

Answer 1

Flat lesion </=1cm diameter

Question 2

Patch

Answer 2

Flat lesion >/= 1cm diameter

Question 3

Plaque

Answer 3

Raised with flat top >/= 1cm

Question 4

Papule

Answer 4

Raised dome-shaped or flat-topped bump </= 1cm

Question 5

Nodule

Answer 5

Raised dome-shaped bump > 1cm

Question 6

Wheal

Answer 6

Itchy, raised, transient area of skin with blanching and erythema

Question 7

Vesicle

Answer 7

Small blister filled with fluid </= 1cm diameter

Question 8

Bulla

Answer 8

Large blister filled with fluid > 1cm diameter

Question 9

Pustule

Answer 9

Discrete, pus filled, raised lesion

Caused by bacteria on or in epidermis. Pus beneath cornified layer or within spinous layer of epidermis

Question 10

Erosion

Answer 10

Loss of partial thickness of epidermis

Surface moist but doesn’t bleed; heals without scar formation; usually occurs from scraping of surface of skin

Question 11

Ulcer

Answer 11

Loss/full thickness loss of epidermis and upper papillary dermis

Always heals with scar formation

Question 12

Scale

Answer 12

Flat plate or flake of cornified layer of epidermis

Question 13

Crust

Answer 13

Dried residue of skin exudates, such as serum, pus, or blood