Neonatal Kommerell diverticulum with mid-ductal aneurysmal patent ductus arteriosus: serial imaging documentation of early natural history.

We report an exceptionally early diagnosis of a Kommerell diverticulum on the first day of life, distinguished by unusual mid-ductal aneurysmal dilatation of the patent ductus arteriosus. Serial echocardiography documented the serial evolution of spontaneous ductal closure and thrombosis formation. CT confirmed a right aortic arch with a retroesophageal Kommerell diverticulum. The infant remains asymptomatic under close surveillance. This case represents one of the youngest reported cases with serial imaging documentation, providing unique insights into the early natural history and highlighting management challenges in asymptomatic neonatal patients.