Authors’ contribution:
KK participated in clinical care of patients, and pre as well as post bronchoscopy monitoring. He drafted the manuscript.
JLM participated in clinical care of patients, performed bronchoscopy and BAL in some of the children, corrected and finalized the manuscript. He will act as guarantor.
PV participated in clinical care of patients, performed bronchoscopy and BAL in some of the children.
AB performed histopathologic examination on two BAL specimens containing solid fragments, and all surgically excised cysts.
NG performed cytopathologic examination of seven BAL specimens.
KKS participated in clinical care of patients, and pre as well as post bronchoscopy monitoring.
AS examined and reviewed the radiologic images of the children.
MS is the Head of the Pediatric Pulmonology Unit, supervising all clinical care of the children in the Unit.