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Postinfectious bronchiolitis obliterans in children: clinical and radiological profile and prognostic factors
Ebru Yalçin1, Deniz Doğru, Mithat Haliloğlu
1Chest Diseases Unit, Department of Pediatrics, Hacettepe University Faculty of Medicine, Ankara, Turkey. ebruy@hacettepe.edu.tr
Insights
Postinfectious bronchiolitis obliterans (BO) in children is linked to chronic airflow obstruction. This study found adenoviruses as a common cause but no clear prognostic factors for disease severity.
Area of Science:
- Pediatric Pulmonology
- Infectious Diseases
- Respiratory Medicine
Background:
- Postinfectious bronchiolitis obliterans (BO) is a syndrome of chronic airflow obstruction.
- It is characterized by inflammatory changes in the small airways.
Purpose of the Study:
- To determine the etiology of postinfectious BO in children.
- To identify clinical and radiological features.
- To define prognostic factors for postinfectious BO.
Main Methods:
- Retrospective review of medical records for 20 children with postinfectious BO.
- Follow-up period from January 1994 to August 2001.
- Diagnosis confirmed by thoracic high-resolution computed tomography and clinical features.
Main Results:
- Adenoviruses were the most common identified etiologic agents.
- Cough and wheezing persisted in all patients post-infection.
- No prognostic factors (age, gender, treatment timing, bronchiectasis, atelectasis, etiology) predicted disease severity.
Conclusions:
- The role of anti-inflammatory agents in postinfectious BO remains controversial.
- No prognostic factors for disease severity were identified in this cohort.
- Close follow-up and meticulous lung care are essential to minimize complications.
Background:
Postinfectious bronchiolitis obliterans (BO) designates a clinical syndrome of chronic airflow obstruction associated with inflammatory changes in the small airways.
Objectives:
The aim of this study was to determine the etiology, clinical and radiological features and define prognostic factors of postinfectious BO in children.
Methods:
We undertook a review of the medical records of 20 children with postinfectious BO, who were followed up between January 1994 and August 2001.
Results:
Postinfectious BO was diagnosed in 11 boys and 9 girls with a median age of 21.5 months (6-69 months) who were followed up for a median of 23 months. Cough and wheezing persisted since the initial lung infection in all patients. Postinfectious BO was diagnosed in an average of 6 months (1-42 months) after the acute illness. Adenoviruses were the most common etiologic agents identified serologically. The diagnoses of postinfectious BO was made by thoracic high-resolution computed tomography and clinical features. Corticosteroid therapy was used in 17 patients and supportive treatment was applied in all patients. Age at initial lung infection, gender, time of starting corticosteroid treatment, presence of bronchiectasis or atelectasis and etiologic agents identified on presentation did not predict severity in our study.
Conclusions:
Despite the prominent role of inflammation in the pathogenesis of postinfectious BO, the use of anti-inflammatory agents remains controversial. We could not identify any prognostic factors related to disease severity. In order to minimize associated complications, patients with postinfectious BO should be closely followed up and receive meticulous lung care.
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