Necrotizing enterocolitis

What it is

From: Orphanet

A rare intestinal disease characterized by potentially life-threatening inflammatory bowel necrosis predominantly affecting preterm neonates. Patients may present with feeding intolerance, lethargy, temperature instability, abdominal distention, blood-stained stools, diarrhea, bilious vomiting, apnea, and signs of sepsis. Radiographic features include pneumatosis intestinalis, portal venous gas, presence of fixed, dilated intestinal loops, bowel wall edema, and (in case of bowel perforation) pneumoperitoneum.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Premature birth · Very frequent (99-80%)

The birth of a baby of less than 37 weeks of gestational age.

Abdominal distention · Frequent (79-30%)

Distention of the abdomen.

Bloody diarrhea · Frequent (79-30%)

Passage of many stools containing blood.

Cyanosis · Frequent (79-30%)

Bluish discoloration of the skin and mucosa due to poor circulation or inadequate oxygenation of arterial or capillary blood.

Decreased total neutrophil count · Frequent (79-30%)

Abnormal decrease of absolute number of neutrophils in the blood, per microlitre, compared to a reference range for a given sex and age-group.

Diarrhea · Frequent (79-30%)

Abnormally increased frequency (usually defined as three or more) loose or watery bowel movements a day.

Fatigue · Frequent (79-30%)

A subjective feeling of tiredness characterized by a lack of energy and motivation.

Food intolerance · Frequent (79-30%)

A detrimental reaction to a food, beverage, food additive, or compound found in foods that produces symptoms in one or more body organs and systems that is not mediated by an immune reaction.

Hypoactive bowel sounds · Frequent (79-30%)

An decreased amount of bowel sounds.

Hyponatremia · Frequent (79-30%)

The concentration of sodium in the blood circulation is below the lower limit of normal.

Increased total leukocyte count · Frequent (79-30%)

An abnormal increase in the number of leukocytes in the blood.

Poor appetite · Frequent (79-30%)

A reduced desire to eat.

Small for gestational age · Frequent (79-30%)

Smaller than normal size according to sex and gestational age related norms, defined as a weight below the 10th percentile for the gestational age.

Abdominal rigidity · Occasional (29-5%)

Involuntary tightening of the abdominal musculature that occurs in response to touching the abdomen to avoid pain. Rigidity can occur in the presence of abdominal inflammation and usually involves only the inflamed area.

Other findings in the same source

From: Orphanet

Additional reported features include Abnormal glucose homeostasis (Occasional (29-5%)); Abnormal heart morphology (Occasional (29-5%)); Acidosis (Occasional (29-5%)); Apnea (Occasional (29-5%)); Ascites (Occasional (29-5%)); Bradycardia (Occasional (29-5%)); Disseminated intravascular coagulation (Occasional (29-5%)); Edema (Occasional (29-5%)); Gastroschisis (Occasional (29-5%)); Hyperglycemia (Occasional (29-5%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

Neonatal

Inheritance in the source

From: Orphanet

Not applicable

Frequency and the population described

From: Orphanet

Point prevalence: 1-5 / 10 000; Worldwide; Value and class.

Which doctor should you see?

The suggested department for discussing Necrotizing enterocolitis is Gastroenterology, with a gastroenterologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• Which digestive symptoms or nutritional changes matter most?
• What question would an endoscopy, scan or laboratory test answer if one is proposed?
• How should persistent pain, bleeding or difficulty eating be followed up?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Necrotizing enterocolitis. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.