MSFinals-4573

You are asked to evaluate a 3 day-old neonate who was born 2 weeks premature after a premature rupture of membranes. The infant has not passed meconium in the first 24 hours and has started vomiting. During the examination, you observe one episode of vomiting that is green in color, indicating bile. The baby appears irritable with a visibly distended abdomen, but has normal oxygen saturation and no fever. Palpation of the abdomen causes further discomfort, but no discrete mass is detected. What is the most probable underlying condition?