Patient History: A 560 gm male baby was born at 23 weeks of gestational age by spontaneous vaginal delivery to a 41-year-old mother with prolonged rupture of membranes for 48 hrs. Mother was treated with clindamycin and received two doses of betamethasone prior to delivery. The baby was hypotonic at birth and was noted to have poor respiratory effort. He was intubated and received the first dose of surfactant and was placed on synchronized intermittent mandatory ventilation (SIMV) with FiO 2 0.4 and transported to the neonatal intensive care unit. On the third day of life, he developed pneumothorax on right side of the chest, which resolved spontaneously in 48 hrs.

On the fifth day of life, he had recurrent oxygen desaturations. An initial chest roentgenogram (CXR) was ordered (image attached). What is most likely diagnosis for this patient? *This patient case is from Docplexus…