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PubMed This is a summary of 58 peer-reviewed journal articles Updated
Neonatology

Understanding Necrotizing Enterocolitis (NEC)

At a Glance

Necrotizing enterocolitis (NEC) is a serious intestinal illness primarily affecting premature infants, causing gut inflammation and tissue damage. Developing NEC is not your fault. While life-threatening, many babies recover with specialized NICU care and tailored medical or surgical treatment.

Finding out your baby has Necrotizing Enterocolitis (NEC) is terrifying. In the high-stakes environment of the NICU, this diagnosis can feel like an overwhelming blow. NEC is a serious condition where the intestinal tissue becomes inflamed and, in some cases, begins to die (necrosis).

Stabilizing Facts for Parents

When you are in the middle of a crisis, it is hard to process information. Here are a few grounding facts to hold onto:

  1. It is not your fault. NEC is caused by a complex “perfect storm” of biological factors related to being born early, including a fragile gut and an exaggerated immune response [1][2]. It is not caused by anything you did during pregnancy or any choice you made in the NICU.
  2. Prematurity is the biggest factor. The disease disproportionately affects extremely premature infants (born before 32 weeks) and very low birth weight infants [3][4].
  3. Honest Survival Statistics. It is important to have honest expectations. While mortality and morbidity rates have decreased over time thanks to better NICU care, NEC remains a life-threatening illness [5][6]. Survival depends heavily on your baby’s birth weight, how early they were born, and whether the disease progresses to the point of needing surgery [7].
  4. Human milk is protective, but not an absolute shield. While providing human milk is highly protective against NEC, even babies receiving an exclusive human milk diet can still develop the disease due to the extreme biological challenges of prematurity [8][9].

How Doctors Track the Disease

Doctors use a classification tool called Bell’s Staging System to describe how advanced the NEC is and decide on the best treatment plan [10]. You can learn more about this system and the clinical signs of the disease in our section on The Biology and Early Warning Signs.

The medical team will use a variety of Diagnostic Tests and Imaging to monitor your baby’s bowel. Based on those results, they will determine the best Medical and Surgical Treatment Options, prioritizing your baby’s comfort and pain management at every step.

Though the road ahead may involve Complications and Long-Term Monitoring, many babies do recover and go on to achieve enteral autonomy (digesting food entirely on their own) [11]. Together with your medical team, you will establish safe Feeding Strategies for Recovery to protect your baby’s gut as they heal.

In this guide

5 chapters

01

The Biology and Early Warning Signs of NEC

Learn the early warning signs of Necrotizing Enterocolitis (NEC). Understand the biological causes, NICU symptoms, and how doctors use Bell's Staging.

02

Diagnostic Tests and Imaging

Learn how doctors diagnose Necrotizing Enterocolitis (NEC) using abdominal X-rays, ultrasounds, and blood tests to monitor your baby's gut health and severity.

03

Medical and Surgical Treatment Options

Learn about medical and surgical treatment options for Necrotizing Enterocolitis (NEC), including bowel rest, antibiotics, laparotomy, and pain management.

04

Life After NEC: Complications and Monitoring

Learn about life after your baby's Necrotizing Enterocolitis (NEC). Understand long-term complications like strictures, short bowel syndrome, and development.

05

Feeding Strategies for Recovery and Protection

Learn safe NICU feeding strategies for babies recovering from necrotizing enterocolitis (NEC). Discover why human milk and feeding protocols protect the gut.

Common questions in this guide

What causes necrotizing enterocolitis (NEC) in premature babies?
NEC is caused by a complex combination of biological factors related to being born early. These include having a fragile, underdeveloped gut and an exaggerated immune response. It is important to know that it is not caused by anything a parent did during pregnancy.
Can providing breast milk prevent my baby from getting NEC?
Providing human milk is highly protective against NEC and supports gut health. However, because extreme prematurity presents such intense biological challenges, even babies receiving an exclusive human milk diet can still develop the disease.
How do doctors determine how severe my baby's NEC is?
Doctors use a classification tool called Bell's Staging System to describe how advanced the disease is. This system, along with diagnostic tests and imaging, helps the medical team determine the best medical or surgical treatment plan for your baby.
What factors influence survival and recovery from NEC?
Survival and recovery depend heavily on the baby's birth weight, how early they were born, and whether the disease has progressed to the point of needing surgery. With careful treatment and feeding strategies, many babies recover and eventually learn to digest food entirely on their own.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Can you walk me through the specific factors (birth weight, current Bell's Stage) that are currently influencing my baby's prognosis?
  2. 2.Who is leading the communication with our family between the neonatologists and pediatric surgeons?
  3. 3.What pain management scale are you using to assess my baby's comfort level right now?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (11)
  1. 1

    The inhibition of enterocyte proliferation by lithocholic acid exacerbates necrotizing enterocolitis through downregulating the Wnt/β-catenin signalling pathway.

    Feng Z, Jia C, Lin X, et al.

    Cell proliferation 2022; (55(5)):e13228 doi:10.1111/cpr.13228.

    PMID: 35441471
  2. 2

    Neonatal Necrotizing Enterocolitis: An Update on Pathophysiology, Treatment, and Prevention.

    Roberts AG, Younge N, Greenberg RG

    Paediatric drugs 2024; (26(3)):259-275 doi:10.1007/s40272-024-00626-w.

    PMID: 38564081
  3. 3

    Incidence of neonatal necrotising enterocolitis in high-income countries: a systematic review.

    Battersby C, Santhalingam T, Costeloe K, Modi N

    Archives of disease in childhood. Fetal and neonatal edition 2018; (103(2)):F182-F189 doi:10.1136/archdischild-2017-313880.

    PMID: 29317459
  4. 4

    Necrotizing Enterocolitis and Its Predictors Among Preterm Neonates Admitted in Neonatal Intensive Care Units of Gurage Zone Public Hospitals, Southwest Ethiopia, 2021.

    Chekole Temere B, Aynalem Mewahegn A, Tefera Zewudie B, et al.

    Pediatric health, medicine and therapeutics 2022; (13()):95-102 doi:10.2147/PHMT.S353663.

    PMID: 35386531
  5. 5

    Trends in incidence and outcomes of necrotizing enterocolitis over the last 12 years: A multicenter cohort analysis.

    Han SM, Hong CR, Knell J, et al.

    Journal of pediatric surgery 2020; (55(6)):998-1001 doi:10.1016/j.jpedsurg.2020.02.046.

    PMID: 32173122
  6. 6

    Incidence, Treatment, and Outcome Trends of Necrotizing Enterocolitis in Preterm Infants: A Multicenter Cohort Study.

    Zozaya C, García González I, Avila-Alvarez A, et al.

    Frontiers in pediatrics 2020; (8()):188 doi:10.3389/fped.2020.00188.

    PMID: 32478014
  7. 7

    Contemporary Outcomes for Infants with Necrotizing Enterocolitis-A Systematic Review.

    Jones IH, Hall NJ

    The Journal of pediatrics 2020; (220()):86-92.e3 doi:10.1016/j.jpeds.2019.11.011.

    PMID: 31982088
  8. 8

    Solely human milk diets for preterm infants.

    Taylor SN

    Seminars in perinatology 2019; (43(7)):151158 doi:10.1053/j.semperi.2019.06.006.

    PMID: 31301819
  9. 9

    The Association of Human Milk Feeding With Short-Term Health Outcomes Among Chinese Very/Extremely Low Birth Weight Infants.

    Peng W, Han J, Li S, et al.

    Journal of human lactation : official journal of International Lactation Consultant Association 2022; (38(4)):670-677 doi:10.1177/08903344221078237.

    PMID: 35236170
  10. 10

    Challenges in diagnosing necrotizing enterocolitis.

    Kim JH, Sampath V, Canvasser J

    Pediatric research 2020; (88(Suppl 1)):16-20 doi:10.1038/s41390-020-1090-4.

    PMID: 32855507
  11. 11

    Necrotizing enterocolitis is associated with earlier achievement of enteral autonomy in children with short bowel syndrome.

    Sparks EA, Khan FA, Fisher JG, et al.

    Journal of pediatric surgery 2016; (51(1)):92-5.

    PMID: 26700691

This page is for informational purposes only and does not replace professional medical advice. Always consult your neonatologist or pediatric surgeon regarding your baby's specific NEC diagnosis, staging, and care plan.

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