<prompt> True about omphalocele is all, EXCEPT:Umbilical cord inses into the sacIncidence of approximately 1 in 5000 live bihsAbdominal wall defect measures 4 cm in diameterNone of the above  <response>: Omphalocele refers to a congenital defect of the abdominal wall in which the bowel and solid viscera are covered by peritoneum and amniotic membrane. The umbilical cord inses into the sac. The abdominal wall defect measures 4 cm in diameter. Omphalocele has an incidence of approximately 1 in 5000 live bihs. Ref: Schwazs principle of surgery 9th edition, chapter 39. 