Dyspnea and Wheezing after Adenosine Injection in a Patient with Eosinophilic Bronchitis

Table 1

Comparison of clinical findings and tests between asthma, cough variant asthma, and eosinophilic bronchitis.

	Wheezing	Cough	Bronchoprovocation testing (airway hyperresponsiveness)	Eosinophils in sputum	Exhaled oral nitric oxide	Response to inhaled steroids
Asthma	Common symptom	May be present	Positive methacholine challenge test	Sputum eosinophilia ($\ge$3%)	$>$30 parts/billion	Improved symptoms
Cough variant asthma	Absent	Always present	Positive methacholine challenge test	Sputum eosinophilia ($\ge$3%)	$>$30 parts/billion	Improved symptoms
Eosinophilic bronchitis	Absent	Always present	Negative methacholine challenge test	Sputum eosinophilia ($\ge$3%)	$>$30 parts/billion	Improved symptoms