Hernia of umbilical cord containing gallbladder

An 11-day-old male neonate delivered by C-section presented to the emergency department with the misdiagnosis of umbilical hernia. The physical examination found a hernia of the umbilical cord with a defect of 3cm, and a small non-reducible umbilical mass covered with a thick and opaque membrane. The newborn has no other physical anomalies. Laboratory tests were also within normal ranges. The abdominal US was poorly contributive, and the radiologist concluded that there is an intraperitoneal structure within the sac without anomalies of the hepato-biliary and urinary tracts.