A 10-year-old girl presents to the clinic, with her mother, complaining of a circular, itchy rash on her scalp for the past 3 weeks. Her mother is also worried about her hair loss. The girl has a past medical history significant for asthma. She needs to use her albuterol inhaler once per week on average. Her blood pressure is 112/70 mm Hg; the heart rate is 104/min; the respiratory rate is 20/min, and the temperature is 37.0°C (98.6°F). On exam, the patient is alert and interactive. Her lungs are clear on bilateral auscultation. On palpation, a tender posterior cervical node is present on the right side. Examination of the head is shown in the image. Which of the following is the best treatment option for the patient?
ASubcutaneous triamcinolone
BTopical betamethasone
CKetoconazole shampoo
DOral terbinafine
EOral doxycycline
A 23-year-old woman comes to the physician because of a 5-month history of a pruritic rash on the bilateral upper extremities. She has no history of serious illness and takes no medications. A skin biopsy of the rash shows intraepidermal accumulation of edematous fluid and widening of intercellular spaces between keratinocytes. Which of the following is the most likely diagnosis?
ADermatitis herpetiformis
BEczematous dermatitis
CAcanthosis nigricans
DLichen planus
EPsoriasis vulgaris
A 28-year-old homeless male with a past medical history significant for asthma comes to your clinic complaining of a chronic rash on his scalp and feet. He describes the rash as “dry and flaky,” and reports it has been present for at least a year. He was using a new dandruff shampoo he got over the counter, with little improvement. The patient reports it is extremely itchy at night, to the point that he can't sleep. On exam, you note a scaly patch of alopecia, enlarged lymph glands along the posterior aspect of his neck, and fine scaling in between his toes and on the heel and sides of his foot. His temperature is 99°F (37°C), blood pressure is 118/78 mmHg, and pulse is 81/min. Which of the following is the most accurate test for the suspected diagnosis?
AKOH preparation of scalp scraping
BWood's lamp
CSkin biopsy with histopathological examination
DCBC and total serum IgE
ECulture on Sabouraud dextrose agar
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