title: Persistent airflow obstruction in asthma of patients with Churg-Strauss syndrome and long-term follow-up.
abstract: BACKGROUND
  Little is known about the long-term outcome of airflow obstruction in asthma of patients with Churg-Strauss syndrome (CSS).
  
  
  METHODS
  We conducted a retrospective study of 24 consecutive patients (aged 41.1 +/- 13.5 years) with CSS in a single center. All had asthma (starting 8.1 +/- 9.5 years prior to the diagnosis of CSS), blood eosinophilia (6.1 +/- 4.4 x 10(9)/l) and systemic manifestations of CSS. Antineutrophil cytoplasmic antibodies were found in 7 of 22 tested patients. Seven patients had smoked (a mean of 10 pack-years). All patients received oral corticosteroids, 11 cyclophosphamide and 23 inhaled corticosteroids.
  
  
  RESULTS
  Airflow obstruction was found in 14 patients (70%) at diagnosis, and in 11 of 22 patients (50%) at the time of the clinical remission of CSS. The mean postbronchodilator FEV1/FVC and FEV1 were 69 +/- 12% and 74 +/- 21% of predicted at diagnosis (n = 20); 71 +/- 10% and 92 +/- 19% of predicted at the clinical remission (n = 22); and 64 +/- 13% and 80 +/- 21% at last visit (n = 13), respectively. During follow-up, postbronchodilator FEV1 increased by 30 +/- 28% in six patients with FEV1/FVC < 70% despite inhaled therapy who received higher dose of oral corticosteroids. At last visit, 5 of 13 patients (38%) with more than 3 years of follow-up had persistent airflow obstruction as defined by postbronchodilator FEV1/FVC < 70% and FEV1 < 80% of predicted.
  
  
  CONCLUSIONS
  Airflow obstruction due to uncontrolled asthma is present despite corticosteroids in many patients at diagnosis and at clinical remission of CSS, and during follow-up. It may be still partly reversible with increased oral corticosteroid treatment.
authors.affiliation: Hospices civils de Lyon, Hôpital Louis Pradel, centre de référence des maladies orphelines pulmonaires, Université de Lyon, UCBL-INRA-ENVL-EPHE, UMR, IFR, France.
authors.forename: V
authors.initials: V
authors.lastname: Cottin
authors.forename: C
authors.initials: C
authors.lastname: Khouatra
authors.forename: R
authors.initials: R
authors.lastname: Dubost
authors.forename: J-C
authors.initials: JC
authors.lastname: Glérant
authors.forename: J-F
authors.initials: JF
authors.lastname: Cordier
mesh_terms: D000293:Adolescent; D000305:Adrenal Cortex Hormones / Q000627:therapeutic use*; D000328:Adult; D018927:Anti-Asthmatic Agents / Q000627:therapeutic use*; D001249:Asthma / Q000150:complications* / Q000188:drug therapy* / Q000503:physiopathology; D015267:Churg-Strauss Syndrome / Q000150:complications* / Q000188:drug therapy / Q000503:physiopathology; D003520:Cyclophosphamide / Q000627:therapeutic use; D005260:Female; D005500:Follow-Up Studies; D005541:Forced Expiratory Volume; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D012907:Smoking; D014797:Vital Capacity
chemical_list: D000305:Adrenal Cortex Hormones; D018927:Anti-Asthmatic Agents; D007166:Immunosuppressive Agents; D003520:Cyclophosphamide