Normal pregnancy and birth. Born at 42 weeks, birth weight 3800 g.
Ventricular septal defect (VSD) diagnosed postnatally.
Normal development, fully vaccinated.
Cough starting on the day before admission, fever starting on the day of admission.

Nasal swab positive for respiratory syncytial virus (RSV).

Viral lung infections commonly manifest as peribronchial cuffing and interstitial infiltrates. In this case, however, RSV pneumonia has a predominantly alveolar pattern. The RUL atelectasis was reported to the treating pediatrician, which prompted treatment with respiratory physical therapy.