Spontaneous multiloculated pneumomediastinum in a newborn: Case report [Pneumomediastino espontâneo multiloculado em recém-nascido: Caso clínico]

Spontaneous pneumomediastinum in a term baby without assisted ventilation or known underlying pulmonary disease is uncommon. the authors present a case report of a term baby delivered by caesarean that developed mild respiratory distress after birth. the pulmonary x-ray on day 2 showed an abnormal gas lucency adjacent to the left cardiac border elevating thymic border indicative of pneumomediastinum. our case demonstrates two unique features of neonatal pneumomediastinum - the presence of multiple internal septae and its tendency to loculate locally. the authors present this case for its rarity and the specific imagiological aspects.