Primary Skin Lesions

Question 1

An elevated, firm, circumscribed area; less than 1 cm in diameter

Answer 1

Papule: e.g. Wart(verruca), elevated moles, lichen planus

Question 2

A flat, non palpable, irregularly shaped macule greater than 1cm in diameter

Answer 2

Patch: e.g. Vitiligo, port-wine stains, Mongolian spots, cafe au lait patch

Question 3

Elevated, firm, and rough lesion with a flat top surface greater than 1 cm in diameter

Answer 3

Plaque: e.g. Psoriasis, seborrheic, and actinic keratosis

Question 4

Elevated, irregular shaped area of cutaneous edema; solid, transient, variable diameter

Answer 4

Wheal: e.g. Insect bites, urticaria, allergic reaction

Question 5

Elevated, firm, circumscribed lesion; deeper in dermis than papule; 1-2cm in diameter

Answer 5

Nodule: e.g. Erythema nodosum, lipoma

Question 6

Elevated and solid lesion; May or may not be clearly demarcated; deeper in dermis; greater than 2cm in diameter

Answer 6

Tumor: e.g. Neoplasms, benign tumor, lipoma

Question 7

Elevated, circumscribed, superficial, not into dermis; filled with serous fluid; less than 1cm in diameter

Answer 7

Vesicle: e.g. Varicella( chickenpox), herpes zoster( shingles)

Question 8

Vesicles greater than 1 cm in diameter

Answer 8

Bulla: e.g. Blister, pemphigus vulgaris

Question 9

Elevated, superficial lesion; similar to Vesicle but filled with purulent material

Answer 9

Pustule: e.g. Impetigo, acne

Question 10

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

Answer 10

Cyst: e.g. Sebaceous cyst, cystic acne

Question 11

Fine, irregular, red lines produced by capillary dilation

Answer 11

Telangiectasia: in rosacea

Question 12

A flat, circumscribed area that is a change in the color of the skin; less than 1 cm in diameter

Answer 12

Macule: e.g. Freckles, flat moles( nevi), petechiae, measles