What is an omphalocele?

An omphalocele is characterized by a defect at the umbilical site where the abdominal contents, such as intestines or other viscera, protrude through the abdominal wall. The key feature of an omphalocele is that this protrusion is covered by a thin, transparent sac, which includes a layer of peritoneum, making it distinct from other abdominal wall defects. This covering can provide some protection to the organs contained within it.

In contrast, the other options describe different conditions or anomalies. For instance, the protrusion of viscera through an abdominal ring is typically associated with a different type of defect known as a hernia, while the absence of abdominal wall and the presence of abdominal contents outside the body without a covering are associated with more severe defects such as gastroschisis. Understanding the specific characteristics of an omphalocele helps in differentiating it from these other conditions and underscores the importance of accurate diagnosis and management in a clinical setting.