Pulmonary artery sling (PAS), a rare congenital disorder, is a cause of pulmonary distress and tracheomalacia. It is characterized by the emergence of the left pulmonary artery (LPA) from outside of the pericardium as a posterior branch off the right pulmonary artery (RPA). Then it circles the distal trachea and right mainstem bronchus by traveling between the trachea and esophagus. Finally, it indents these structures and displaces the trachea to the left. PAS significantly shows tracheal and esophageal symptoms.

This case represents the rare occurrence of PAS in a newborn. Case presentation A newborn boy was admitted to the neonatal intensive care unit (NICU) because of respiratory distress. He was a twin of dichorionic diamniotic pregnancy. A routine resuscitation was provided to the patient. Investigations Two flat and one right lateral decubitus chest x-rays were performed, which…