Dermatology PANCE Q&A

A patient presents with a rash, characterized by red macules and edematous papules with a clearing center. This best describes which of the following? A erythema marginatum B erythema multiforme C varicella D impetigo - Answer- B Target lesions, also termed iris lesions, are characteristic of erythema multiforme. The rash may be recurrent but typically resolves over 3-6 weeks. In a patient suspected of having seborrheic dermatitis, the most common site of involvement would be the A upper extremities. B thighs C scalp. D feet. - Answer- C The most common site of involvement of seborrheic dermatitis is the scalp. Other common sites include the eyebrows, eyelids, nasolabial fold, and ears A 26 year-old male complains of intense itching, especially at night and after hot showers, for the past 4 days. On physical examination he has a few red papules and areas of excoriation on his volar wrists, between his fingers, and around his waist. Proper diagnosis should include which of the following tests? A KOH prep B Gram stain C Skin scraping microscopy D Tzanck prep - Answer- C The history and exam is consistent with a scabies infection. Scrapings from the burrows should be examined for the presence of mites, eggs, and feces. A 35 year-old female who recently returned from a backpacking trip complains of fatigue, malaise, fever, chills, and arthralgias. Physical examination reveals a 6 cm annular lesion with a red border and a clear center on her mid-back. Which of the following laboratory tests would support your diagnosis? A KOH prep of skin scrapings B Blood cultures C RAST testing D Serologic antibody testing - Answer- D Most people with Lyme Disease will have a positive serologic test after the first few weeks of infection and this would support the diagnosis. A 56