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Clinical Case 3
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1

RR is a 13 year-old who has come to see you for the evaluation of a chronic cough. He states that his cough began over 1 month ago and has continued since without change. There is no diurnal variation that he or his family have noticed. He denies wheezing or dyspnea. He has been treated with 2 courses of antibiotics for sinusitis without any effect. His 7 year-old sibling has developed similar symptoms over the past week but seems to be responding somewhat to an OTC cough suppressant. RR has no past medical history. His height and weight are in the 75th percentile for his age and sex. His physical examination is notable only for minimal erythema and cobblestoning of his posterior pharynx. He has a dry ‘barking’ cough.

Which of the following is unlikely in the differential diagnosis of chronic cough in this teen?
A)Asthma
B)Cystic Fibrosis
C)GERD
D)Pertussis
E)Postnasal drainage





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