Neonate With Vomiting and Jaundice

A 4-day-old male neonate presented to the neonatology department with recurrent vomiting and jaundice since birth. The gestation and birth were normal. The baby looked well, was afebrile, and had a pulse rate of 135 beats/min, with a blood pressure of 61/31 mm Hg. Circulatory and pulmonary examination results were normal, and the abdomen was nontender, with bowel sounds. The WBC count was…