Terminology

Question 1

Primary lesion

Answer 1

Caused directly by disease process

Question 2

Macule

Answer 2

Flat

Question 3

Patch

Answer 3

Flat > .5 cm

Question 4

Papule / pustule

Answer 4

Raised, domed,

Question 5

Nodule

Answer 5

Raised, domed, > .5 cm

Question 6

Papule

Answer 6

Raised, flat top,

Question 7

Plaque

Answer 7

Raised, flat-top, > .5 cm

Question 8

Vesicle

Answer 8

Blister (fluid filled)

Question 9

Bulla

Answer 9

Blister (fluid filled) > .5 cm

Question 10

Erosion

Answer 10

Denudation of epidermis only

Non-scarring

Question 11

Ulcer

Answer 11

Denudation of epidermis and dermis

Scarring

Question 12

Wheal

Answer 12

Edematous, transient, flat-topped plaque
Typical of urticaria (hives)
Center may appear lighter than edge

Question 13

Secondary Features

Answer 13

Changes due to external factors, such as scratching, trauma, infection, or healing

Question 14

Scale

Answer 14

Thickening of stratum corneum
Adherent
White / fine (typical of xerosis)
Yellow / greasy (typical of seborrheic dermatitis)
Hyperkeratotic

Question 15

Crust

Answer 15

Dried endogenous material

May be serous (common in eczema), hemorrhagic, or honey-colored (impetigo)

Question 16

Excoriation

Answer 16

Linear erosions from scratching

Question 17

Lichenification

Answer 17

Thickening of skin w/ accentuation of skin markings (ridged surface) due to chronic scratching / rubbing

Question 18

Fissure

Answer 18

Linear crack in skin

Question 19

Petechiae

Answer 19

Pinpoint red-brown macules due to intradermal hemorrhage. Non-blanching.

Question 20

Palpable Purpura

Answer 20

Intradermal hemorrhagic papules and plaques. Non-blanching. Bigger spots than petechiae.

Question 21

Epidermal atrophy

Answer 21

“Cigarette paper” wrinkling

Red / brown color. Telangiectasias (visible blood vessels)

Question 22

Dermal atrophy

Answer 22

Skin surface is depressed

Question 23

Brown / black color due to?

Answer 23

Melanin or necrosis

Question 24

Blue color due to?

Answer 24

Melanin deposited deeper in skin

Question 25

Yellow color due to?

Answer 25

Sebaceous tissue (oil gland) or intracellular lipids

Question 26

Annular shape

Answer 26

Round w/ central clearing

Question 27

Polycystic

Answer 27

Plaques coalesce

Question 28

Square eruptions or those that follow pattern of external object often due to what?

Answer 28

Contact dermatitis

Question 29

Serpiginous

Answer 29

Wavy, snake-like border

Question 30

Stellate

Answer 30

Angulated edges | May be due to scratching or condition of underlying vasculature.

Question 31

Blaschkoid

Answer 31

Swirling patterns due to post-zygotic mutation of melanocytes or keratinocytes

Question 32

Dermatomal (Zosteriform)

Answer 32

Linear bands that start and end at midline of trunk Reflect nerve supply to skin Ex: Herpes zoster (shingles)

Question 33

Koebernization

Answer 33

Linear collection of lesions arising from external trauma | Common in psoriasis

Question 34

Indurated

Answer 34

Firm texture upon palpation

Question 35

Fluctuant

Answer 35

Compressible denoting underlying fluid or pus

Question 36

Burrow

Answer 36

Wavy or linear track typical of scabies infection

Question 37

Impetiginized

Answer 37

Secondarily infected w/ staph | Honey-colored crust

Question 38

Eschar

Answer 38

Black, adherent crust of necrotic tissue

Question 39

Pedunculated

Answer 39

Narrower at base of lesion

Question 40

Which skin cancers are commonly translucent?

Answer 40

Basal cell skin cancer

Question 41

Umbilicated

Answer 41

Central depression | Classic for molluscum

Question 42

Verrucus

Answer 42

Rough, warty surface

Question 43

Papulosquamous (presentation and specific diseases)

Answer 43

Papules and plaques w/ overlying scale | Eczema, psoriasis, contact dermatitis, seborrheic dermatitis, tinea infection, drug eruption

Question 44

Vesiculobullous (presentation and diseases)

Answer 44

Vesicles and bullae Round erosions w/ collarette of scale reflects a ruptured bulla. Pemphigus vulgaris, bullous pemphigoid, cicatricial pemphigoid, epidermolysis bullosa, dermatitis herpetiformis, bullous impetigo, bullous tinea infection

Question 45

Collarette

Answer 45

Narrow rim of loosened keratin overhanging the periphery of a circumscribed skin lesion

Question 46

Urticarial (presentation and diseases)

Answer 46

Wheals | Urticaria, urticarial drug eruption, and bullous pemphigoid

Question 47

Acneiform (presentation and diseases)

Answer 47

Papules and pustules w/ follicular involvement | Acnea, rosacea, perioral dermatitis, hidradenitis suppurativa, folliculitis, pyoderma faciale

Question 48

Rosacea

Answer 48

Chronic skin condition characterized by facial redness, small and superficial dilated blood vessels on facial skin, papules, pustules, and swelling.

Question 49

Ecchymosis

Answer 49

Subcutaneous purpura > 1 cm or a hematoma. Commonly called a bruise, but bruises are caused by trauma whereas ecchymoses, are not necessarily caused by trauma.