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Progressive intraparenchymal bronchogenic cyst in a neonate.

Neonatal parenchymal bronchogenic cysts (BC) are a very rare congenital anomaly. Usually patients with BC are born with severe respiratory distress or cardiovascular insufficiency are asymptomatic till they grow up to older children and adults. We report a case of neonatal BC with a prenatal diagnosis of congenital tracheobronchial cystic anomalies of the right lung. The cyst was 36 mm in diameter at 17 week gestational period but diminished in size to 21 mm at 35 weeks. After birth, chest X-ray demonstrated a growing cyst 50 mm in diameter and gradual displacement of the heart and mediastinum from the right to the left day by day. Right S3 segmentectomy was performed on the 5th day.