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Necrotizing Enterocolitis Characteristics and Clinical Features

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Necrotizing Enterocolitis Characteristics and Clinical Features

Necrosis-crow Enter-intestine In-Flames and Clinical Clipboard
Necrotizing enterocolitis is a life-threatening bowel disease that is characterized by bowel wall inflammation. It traditionally affects premature neonates. Early clinical features include failure to thrive, vomiting, and rectal bleeding while late clinical features include gastrointestinal perforation, peritonitis, or even sepsis and shock.
Bowel Wall Inflammation
Bowel-bowl Wall In-Flames

Necrotizing enterocolitis is an inflammatory disorder of the GI tract primarily affecting neonates and children in the 1st week of life. The pathogenesis of this condition involves bacterial invasion of the gut and subsequent inflammation.


NEC is the most common cause of acute abdomen in premature neonates. It usually occurs in their 2nd to 4th week of life. It can also affect term infants, affecting them in the 1st week.

Failure to Thrive
Very Skinny Baby

Early clinical features of this disease include failure to thrive, bilious vomiting and rectal bleeding. Failure to thrive (FTT) describes a holistic clinical picture of inadequate growth and has many underlying etiologies, including NEC.


Vomiting can occur in patients with NEC. It is a sign of gastrointestinal instability.

Rectal Bleeding
Rectum-rectangle Bleeding

Rectal bleeding may occur as gastrointestinal mucosa is destroyed and capillaries are left exposed.

GI Perforation
GI Perforated

Gastrointestinal perforation can be a serious complication of necrotizing enterocolitis. A perforated bowel will usually require emergent surgery.


Late symptoms of this disease include abdominal guarding and pain on palpation. Reddening of the flanks is a late symptom of peritonitis and often indicates perforation of the necrotic intestine. Peritonitis is not uncommon after GI perforation.

Sepsis and Shock
Sepsis-snake and Electric Shock

Following peritonitis, sepsis can occur in these patients. Lab signs for sepsis include left shift, leukocytosis, elevated CRP, anemia and thrombocytopenia. This is a very serious complication that may result in ICU-level care.


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