AANP Dermatology 2

Question 1

Tzanck smear revealing multinucleated giant cells is consistent with infection caused by which organism?

Accepted Answer

Herpes simplex virus

Answer

Multinucleated giant cells (Tzanck cells) on smear are pathognomonic for herpesvirus infections, including HSV-1, HSV-2, and varicella-zoster virus.

Question 2

Which topical medication is the treatment of choice for tinea pedis (athlete's foot)?

Accepted Answer

Topical clotrimazole or terbinafine

Answer

Tinea pedis is a dermatophyte fungal infection treated with topical antifungals such as clotrimazole (azole) or terbinafine (allylamine) applied for 2–4 weeks.

Question 3

A patient on a biologic therapy for psoriasis should be screened for which infection before initiating treatment?

Accepted Answer

Latent tuberculosis

Answer

TNF-alpha inhibitors and other biologics used for psoriasis increase the risk of reactivating latent TB; a tuberculin skin test or IGRA must be performed before initiation.

Question 4

What is the most common cause of bacterial impetigo in children in the United States?

Accepted Answer

Staphylococcus aureus (including MRSA)

Answer

Staphylococcus aureus is the predominant cause of impetigo in the US, with MRSA increasingly common; it presents as honey-crusted lesions on the face and extremities.

Question 5

A patient reports a skin lesion that began as a papule and developed a central depression with umbilication. What is the most likely diagnosis?

Accepted Answer

Molluscum contagiosum

Answer

Molluscum contagiosum, caused by a poxvirus, produces dome-shaped papules with a characteristic central umbilication (depression) that distinguish it from other skin lesions.

AANP - American Association of Nurse Practitioners Practice Test

AANP - American Association of Nurse Practitioners Practice Test

AANP Dermatology 2