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Updated: Aug 19, 2026

Protocol and Guidelines for Point-of-Care Lung Ultrasound in Diagnosing Neonatal Pulmonary Diseases Based on International Expert Consensus
Published on: March 6, 2019
[Persistent tachypnea in infants: possibly due to interstitial pneumonitis]
M L Kingma1, J H J M van Krieken, J J E M de Nef
1Kinder- en Jeugdcentrum, Leids Universitair Medisch Centrum, Leiden.
Insights
Tachypnea in infants may indicate interstitial pneumonitis, often missed by standard exams. Early diagnosis via CT scans and lung biopsy is crucial for treatment and prognosis.
Area of Science:
- Pediatric Pulmonology
- Neonatal Medicine
- Pathology
Background:
- Infantile tachypnea and feeding issues can present without obvious cause.
- Interstitial pneumonia/pneumonitis is a potential underlying condition in infants.
Observation:
- Three male infants aged 3, 4.5, and 11 months presented with tachypnea and feeding difficulties.
- Initial examinations failed to identify the cause.
- Open lung biopsy revealed interstitial pneumonia/pneumonitis.
Findings:
- Treatment with hydrochloroquine and prednisone in the two youngest infants had varied outcomes, with one fatality.
- One infant on hydrochloroquine and another untreated showed normal respiratory function and growth.
- A normal chest X-ray does not rule out incipient interstitial pneumonitis.
Implications:
- High-resolution CT scans are vital for early detection of interstitial pneumonitis in infants.
- Histological analysis of lung biopsy is essential for accurate diagnosis, treatment planning, and prognosis.
- Tachypnea can be the sole early indicator of interstitial pneumonitis in infants.
Abstract:
In three male infants aged 3, 4.5 and 11 months with tachypnea and feeding problems, the initial supplementary examination revealed no possible cause. The tissue obtained by open lung biopsy showed interstitial pneumonia/pneumonitis. The two youngest patients were treated with hydrochloroquine and prednisone; the youngest died at the age of 18 months. Both the infant who was maintained on hydrochloroquine and the one who did not receive treatment showed a normal respiratory frequency and growth during the following years. Tachypnea is less easily recognised in infants than in older patients. It may be the only early symptom of interstitial pneumonitis. A normal chest X-ray cannot exclude an incipient interstitial pneumonitis as the cause of the tachypnea. A high-resolution CT-scan of the lung parenchyma is necessary in order to detect the disease at an early stage. Histological examination of an open lung biopsy specimen is essential for the specific diagnosis, therapy and prognosis.
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