a b s t r a c tBackground: In 2006, bronchiolitis due to adenovirus nosocomial infections resulted in the closure of a pediatric department in northern Portugal. Objectives: To determine the etiology of bronchiolitis in northern Portugal. Study design: It was a prospective multicenter study on the etiology of bronchiolitis during the respiratory syncytial virus (RSV) season (November-April). Children ≤24 months of age admitted for a first wheezing episode were included. Nasopharyngeal specimens were analyzed by an indirect immunofluorescentantibody assay (IFA) for RSV, adenovirus (HAdV), parainfluenza (PIV) 1-3 and influenza (IV) A and B and by polymerase chain reaction (PCR) or reverse transcription-PCR for the same viruses and for human metapneumovirus (hMPV), bocavirus (HBoV), rhinovirus (HRV), coronaviruses (229/E; NL63; OC43; HKU1) and enterovirus. Results: During this period, 253 children were included, 249 IFA analyses and 207 PCRs were performed. IFA detected RSV in 58.1%; PCR increased it to 66.7%. IFA detected HAdV in 3.2%, PCR 10.0%. PCR detected IV A in 5; IV B in 2; PIV 1 in 6, PIV 2 in 4 and PIV 3 in 11 cases. HBoV, as single agent in 2 cases, and HRV were positive in 8 samples and hMPV in 11. With this virus panel, 19.7% remained without etiology. Conclusions: The most frequent agent was RSV, followed by HAdV. PCR can be cost-effective and more accurate than IFA, which is crucial for HAdV that may be associated with significant mortality (IFA alone did not detect 2/3 of the cases).

We report here the case of a term female newborn that developed severe respiratory distress soon after birth. She was found to be a compound heterozygote for both novel mutations in the ABCA3 gene. ABCA3 deficiency should be considered in mature babies who develop severe respiratory distress syndrome.

DescriptionA 12-month-old boy presented with a history of respiratory distress and stridor since the first month of life. He had been repeatedly misdiagnosed as recurrent croup. The stridor was biphasic, with a more pronounced inspiratory component, and was exacerbated by agitation and supine positioning. He had a large posterior cervical haemangioma, whose extension had never been studied by imaging methods, and delayed growth. Flexible bronchoscopy showed a multilobulated subglottic haemangioma (SGH), occupying more than 70% of the tracheal lumen. MRI showed an angiomatous malformation with the epicentre at the hind head that extended inferiorly to the cervical planes, reaching the median line in retropharyngeal planes with inferior extension (figures 1 and 2). He underwent systemic and intralesional tracheal steroids injections with partial improvement and laser therapy at 5 years of age. Today he is an asymptomatic 14-year-old adolescent with normal growth and development.Infantile haemangiomas are the most common vascular tumours of childhood, affecting 5% of all infants.1 SGH represents 1.5% of the congenital laryngeal abnormalities. Almost 50% of them are Figure 1 Cervical MRI examination, sagittal plane, showing extracranial angiomatous formation with epicentre in the posterior cervical region (white arrow).

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