Dermatology

Question 1

“Stuck on” waxy appearance

Answer 1

Seborrheic keratosis

Question 2

Red plaques with silvery-white scales and sharp margins

Answer 2

Psoriasis

Question 3

The most common type of skin cancer; the lesion is a pearly-colored papule with a translucent surface and telangiectasias

Answer 3

Basal cell carcinoma

Question 4

Honey-colored crust

Answer 4

Impetigo

Question 5

Febrile patient with a history of diabetes presents with a red, swollen, painful lower extremity

Answer 5

Cellulitis

Question 6

Condition with positive Nikolsky sign? Related condition with negative Nikolsky sign?

Answer 6

Positive: Pemphigus vulgaris (also TEN) Negative: Bullous pemphigoid

Question 7

55 year-old obese patient presents with dirty, velvety patches on the back of the neck.

Answer 7

Acanthosis nigricans. Check fasting blood glucose to rule out diabetes.

Question 8

Dermatomal distribution

Answer 8

Herpes zoster (VZV)

Question 9

Flat-topped papules

Answer 9

Lichen planus

Question 10

Irislike target lesions

Answer 10

Erythema multiforme

Question 11

Lesion occurring in a geometric pattern in areas where skin comes into contact with clothing or jewelry

Answer 11

Contact dermatitis

Question 12

Presents with one large patch and many smaller ones in a treelike distribution

Answer 12

Pityriasis rosea

Question 13

Flat, often hypopigmented lesions on the chest and back; KOH prep has a “spaghetti and meatballs” appearance

Answer 13

Tinea (pityriasis) versicolor

Question 14

Five characteristics of a nevus suggestive of melanoma

Answer 14

1. Asymmetry 2. Border irregularity 3. Color variation 4. Diameter >6 mm 5. Evolving appearance

Question 15

Premalignant lesion from sun exposure that can lead to squamous cell carcinoma

Answer 15

Actinic keratosis

Question 16

Crusting vesicles in all stages of evolution on entire body

Answer 16

Primary varicella

Question 17

“Cradle cap”

Answer 17

Seborrheic dermatitis. Treat conservatively with bathing and moisturizing agents.

Question 18

Associated with Propionibacterium acnes and hanges in androgen levels, and the treatment of last resort

Answer 18

Acne vulgaris.

Treatment of last resort: oral isotretinoin (requires monthly blood tests)

Question 19

Painful, recurrent vesicular eruption of mucocutaneous surfaces

Answer 19

Herpes simplex

Question 20

Inflammation and epithelial thinning in the anogenital area, predominantly in postmenopausal women

Answer 20

Lichen sclerosus

Question 21

Exophytic nodules on the skin with scaling or ulceration; the second most common type of skin cancer

Answer 21

Squamous cell carcinoma