Primary Skin Lesions

Question 1

flat, circumscribed area that is a change in the color of the skin, less than 1 cm in diameter (Freckles, petechiae, measles, flat moles)

Answer 1

Macule

Question 2

elevated, firm, circumscribed area, less than 1 cm in diameter (wart, elevated moles, lichen planus)

Answer 2

Papule

Question 3

flat, nonpalpable, irregularly-shaped macule greater than 1 cm in diameter (vitiligo, port wine stains, monogolian spots, café au lait patch)

Answer 3

Patch

Question 4

elevated, firm and rough lesion with flat top surface greater than 1 cm in diameter (psoriasis, seborrheic, and actinic keratosis)

Answer 4

Plaque

Question 5

elevated, irregular-shaped area of cutaneous edema, solid, transient, variable diameter (insect bites, urticaria, allergic reaction)

Answer 5

Wheal

Question 6

elevated, firm, circumscribed lesion, deeper in dermis than a papule, 1 to 2 cm in diameter (erythema nodosum, lipoma)

Answer 6

Nodule

Question 7

elevated and solid lesion, may or may not be clearly demarcated, deeper in dermis, greater than 2 cm in diameter (neoplasms, benign tumor, lipoma)

Answer 7

Tumor

Question 8

elevated, circumscribed, superficial, not into dermis, filled with serous fluid, less than 1 cm in diameter (varicella, herpes zoster)

Answer 8

Vesicle

Question 9

vesicle greater than 1 cm in diameter (blister, pemphigus vulgaris)

Answer 9

Bulla

Question 10

elevated, superficial lesion, similar to a vesicle but filled with purulent fluid (impetigo, acne)

Answer 10

Pustule

Question 11

elevated, circumscribed, encapsulated lesion, in dermis or subcutaneous layer, filled with liquid or semisolid material

Answer 11

Cyst

Question 12

fine, irregular, red lines produced by capillary dilation (in rosacea)

Answer 12

Telangiectasia