Necrotizing enterocolitis (NEC) is the death of tissue in the intestine. It occurs most often in premature or sick babies.
NEC occurs when the lining of the intestinal wall dies. This problem nearly always develops in an infant who is ill or premature. It is likely to occur while the infant is still in the hospital.
The exact cause of this disorder is unknown. A drop in blood flow to the bowel can damage the tissue. Bacteria in the intestine may also add to the problem. Also, premature infants have an undeveloped immune response to factors such as bacteria or low blood flow. An imbalance in immune regulation appears to be involved in NEC.
Babies at higher risk for the condition include:
Symptoms may come on slowly or suddenly, and may include:
Tests may include:
Treatment for a baby who may have NEC most often includes:
The infant will need surgery if there is a hole in the intestines or inflammation of the abdominal wall (peritonitis).
In this surgery, the doctor will:
The bowel may be reconnected after several weeks or months when the infection has healed.
Necrotizing enterocolitis is a serious disease. Up to 40% of infants with NEC die from it. Early, aggressive treatment can help improve the outcome.
Complications may include:
Get emergency medical care if any symptoms of necrotizing enterocolitis develop. Infants who are hospitalized for illness or prematurity are at higher risk for NEC. They are watched closely for this problem before they are sent home.
Greenberg JM, Narendran V, Brady JM, Nathan AT, Haberman B. Neonatal morbidities of prenatal and perinatal origin. In: Lockwood CJ, Copel JA, Dugoff L et al, eds. Creasy and Resnik's Maternal-Fetal Medicine: Principles and Practice. 9th ed. Philadelphia, PA: Elsevier; 2023:chap 73.
Kudin O, Neu J. Neonatal necrotizing enterocolitis. In: Martin RJ, Fanaroff AA, Walsh MC, eds. Fanaroff and Martin's Neonatal-Perinatal Medicine. 11th ed. Philadelphia, PA: Elsevier; 2020:chap 85.
Seed PC. The microbiome and pediatric health. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier; 2020:chap 196.BACK TO TOP
Review Date: 4/28/2023
Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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