LB15.1

Atresia of small intestine

Atresia do intestino delgado

Definition

Jejunoileal atresias and stenoses are major causes of neonatal intestinal obstruction. Atresia refers to a congenital obstruction with complete occlusion of the intestinal lumen. It accounts for 95% of obstructions. Four types of jejunoileal atresias are described. They can range from having a small area of blockage or web to missing large sections of the intestines. Intestinal atresia is one of the most frequent causes of bowel obstruction in the newborn. The ileal atresia is more common than jejunal atresia, and multiple foci are more common than isolated atresia. The most accepted theory regarding the etiology of jejunoileal atresia is that of an intrauterine vascular accident resulting in necrosis of the affected segment. Stenosis, on the other hand, refers to a partial occlusion with incomplete obstruction and accounts for the remaining 5% of cases. A stenosis has an intact mesentery and is a localised narrowing of the bowel. No loss of continuity of the lumen exists.

Inclusions

Congenital absence of small intestine
Congenital stenosis of small intestine

Index Terms

Atresia of small intestineCongenital stenosis of small intestineCongenital absence of small intestinecongenital small intestinal stricture NOSMultiple-level intestinal atresiaSmall intestine atresia type IVCongenital absence, atresia or stenosis of jejunumAtresia of jejunum type IAtresia of jejunum type IIAtresia of jejunum type IIIaApple-peel deformityChristmas tree syndromeApple-peel syndromeChristmas-tree deformityMultiple atresias of jejunum type IVCongenital stenosis of jejunumstenosis of jejunumcongenital jejunal stenosisCongenital absence of jejunumjejunal agenesisjejunum agenesisCongenital atresia of jejunumatresia of jejunumjejunal atresiajejunum atresiaCongenital imperforate of jejunumImperforate jejunumjejunal imperforateCongenital stricture of jejunumCongenital absence, atresia or stenosis of ileumAtresia of ileum type IAtresia of ileum type IIAtresia of ileum type IIIaCongenital stenosis of ileumcongenital ileum obstructionCongenital absence of ileumileum agenesisCongenital atresia of ileumileal atresiaatresia of ileum NOSileum atresiaCongenital stricture of ileum

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