Omphaloceles are characterized by which of the following?

Omphaloceles are primarily characterized by abdominal viscera protruding into the umbilical cord. This condition occurs when there is a defect in the abdominal wall, which results in the intestines, and sometimes other organs, being herniated into the base of the umbilical cord. This protrusion happens during embryonic development when the abdominal contents do not properly return to the abdominal cavity from the umbilical cord.

It's important to note that while there may be additional features associated with omphaloceles, such as potential associations with other anomalies, the most defining characteristic is indeed the herniation of visceral organs into the umbilical cord. This presentation is crucial in the diagnosis and management of neonates with omphaloceles, impacting their treatment plan and outcomes in the Neonatal Intensive Care Unit.