1* & 2* Skin Lesions

Question 0

Patch

Answer 0

Macula that are >1cm, ex: Mongolian spot, café au lait spot.

Question 1

Macule

Answer 1

Just a color change, flat, <1cm, ex: freckles.

Question 2

Papule

Answer 2

Something to can feel (solid, elevated) <1cm, caused by superficial thickening of epidermis, ex: mole.

Question 3

Plaque

Answer 3

Papules coalesce to form surface elevation >1cm. A plateau-like, disk-shaped lesion. Ex: psoriasis.

Question 4

Nodule

Answer 4

Solid, elevated, hard or soft, >1cm. Go deeper into dermis than papule.

Question 5

Tumor

Answer 5

> a few cm in diameter, firm or soft, deeper into dermis; can be benign or malignant. Ex: hemangioma.

Question 6

Wheal

Answer 6

Superficial, raised, and red; slightly irregular shaped due to edema, ex: mosquito bite.

Question 7

Vesicle

Answer 7

Elevated cavity w/ free fluid, up to 1cm, clear serum flows if erupted. Ex: herpes simplex, early varicella, herpes zoster.

Question 8

Bulla

Answer 8

> 1cm, superficial in epidermis, is thin walled so it ruptures easily. Ex: burn, friction blister.

Question 9

Cyst

Answer 9

Encapsulated fluid-filled cavity in dermis or subcutaneous layer, tensely elevating skin. Ex: sebaceous cyst.

Question 10

Pustule

Answer 10

Pus in the cavity. Circumscribed and elevated. Ex: acne.

Question 11

Crust

Answer 11

Scab. Thickened, dried-out exudate left when vesicles/pustules burst or dry up. Color can be red-brown, honey, or yellow depending on ingredients (blood, serum, pus). Ex: impetigo.

Question 12

Scale

Answer 12

Compact, desiccated flakes of skin from shedding of dead excess keratin cells. Ex: eczema.

Question 13

Fissure

Answer 13

Linear crack w/ abrupt edges, extends into dermis, dry or moist. Ex: cracks @ corners of mouth from excess moisture.

Question 14

Erosion

Answer 14

Scooped out but shallow depression. Superficial; epidermis lost; moist but no bleeding; heals w/out scar b/c erosion does not extend into dermis.

Question 15

Ulcer

Answer 15

Deeper depression extending into dermis, irregular shape; may bleed, leaves scar.

Question 16

Excoriation

Answer 16

Self-inflicted scratches from intense itching.

Question 17

Scar

Answer 17

After lesion is repaired, normal tissue is lost and replaced w/ connective tissue. A permanent fibrotic change.

Question 18

Atrophic Scar

Answer 18

Skin level is depressed w/ loss of tissue; a thinning of the epidermis. Ex: striae.

Question 19

Lichenification

Answer 19

Thicker patch of skin from prolonged scratching. Aiden’s ankles & wrists b/c of long term eczema.

Question 20

Keloid

Answer 20

Hypertrophic scar. Skin level is elevated by excess scar tissue.