[Pseudo-asthma and asthma with hypereosinophilia]

Despite of its high prevalence, asthma is not the sole cause of wheezing dyspnea: the obstruction of the principal airways, some diffuse bronchial diseases may present as pseudoasthma. The diagnosis of some behavioral dyspneas as well as functional laryngeal obstruction is sometimes highly difficult. The finding of a marked hypereosinophilia prompts the clinician to research a parasitic infection as a cause of pseudo-asthma, allergic bronchopulmonary aspergillosis complicating asthma, or an idiopathic hypereosinophilic disorder of which asthma is a component (as in Churg and Strauss syndrome).