Dermatology PANCE Questions And Answers Latest Study Solutions

A 13 year-old child presents with a lesion on his right forearm that is occasionally pruritic. On examination, a 2 cm ring of erythema with a scaly border and central clearing is noted. A suspected diagnosis is confirmed by the presence of A a positive patch test. B hyphae on a KOH prep. C gram-positive cocci on Gram stain. D multinucleated cells on Tzanck smear - B Ring-shaped lesions with scaly borders and central clearing are most likely caused by fungal infection. Microscopic examination of scrapings reveals hyphae on KOH prep. A 16 year-old female comes to the office because her acne has become more severe and she would like to discuss treatment. She was originally prescribed topical clindamycin gel 1 year ago to treat open and closed comedones on her face. Despite regular use of the medication, she now has several comedones and papulopustules across her nose, cheeks, chin and forehead. Which of the following would be an appropriate additional treatment for moderate acne? A Intralesional steroids B Oral doxycycline C Benzoyl peroxide gel D Metronidazole cream - B For moderate acne, oral antibiotics are added to the topical medications treatment regimen. A 23 year-old African American female presents with concern regarding "lightening" of the skin in her knees, face, clavicles, and wrists. These areas appear to be increasing in size. She was recently diagnosed with pernicious anemia. In order to confirm her diagnosis, which of the following tests is indicated? A Wood's light B KOH prep C Skin biopsyD Gram stain - C Skin biopsy in a patient with vitiligo will show complete absence of melanocytes and will confirm the diagnosis. A 23 year-old male comes to the office with an intensely itchy rash, especially at night for the past week. His roommates have similar symptoms but have not been evaluated. On physical examination, the wrists, web spaces of the hands, and axillae have thin linear markings, tiny vesicles, and excoriations. Which of the following is the most likely diagnosis? A Pediculosis B Folliculitis C Impetigo D Scabies - D