• occurs when the small opening in the abdominal muscles which allows passage of umbilical cord does not completley close after birth
• allowing intestinal loops to pass through the opening
• 10% of all children are affected
• more common in blacks, girls, and premature infants
• most resolve by age 1year, but consider outpatient referral if becoming larger or still present after 2-3 years of age
• emergent consultation if not reducible, but rarely as most are harmless