Omphalocele is congenital defect that occurs early in fetal life. It is also known as an exomphalos. An opening in the abdominal wall allows the abdominal contents to herniate through the umbilical cord. The abdominal contents are covered with a membraneous sac. In 50% of the children, the liver, spleen, and bladder are also herniated into the sac. The cause is unknown.
Omphaloceles may be diagnosed before birth because of polyhydramnios (excess amniotic fluid) because the babies do not swallow the fluid properly. Ultrasound can also detect this problem and blood work that shows an elevated maternal serum alpha fetal protein level also helps with the diagnosis prior to birth. Surgery will be necessary very quickly in order to be sure that blood supply is maintained to the bowel before that delicate tissue dies. The abdomen is typically small and has to be gradually stretched over a period of weeks so that the abdominal contents can settle into the cavity and healing can take place. Typically a silastic mesh will be sutured over the mass and as healing takes place the intestines will gradually settle into the abdominal cavity until the skin can be closed in a second-stage operation. The baby will be fed intravenously and antibiotics will be given to prevent infection. Putting the abdominal contents into the abdomen can sometimes make it difficult for the lungs to expand, and the baby might need to breathe with the help of a mechanical ventilator machine until lungs expand.
Omphalocele occurs in 1 of 4000 live births, and about 50% of babies will have other congenital defects. Our program has been tracking omphalocele among live births in select counties since 2005 and are gradually expanding statewide.
- Using data from births to Hennepin and Ramsey county residents between 2012-2016, we found that 2 babies were born with omphalocele per 10,000 births.
- Using this data, we estimate about 14 babies are born with omphalocele every year in Minnesota.
Parental education and support are essential, and local, regional and national organizations may be very helpful.