jejunal atresia
A congenital obstruction of the jejunum resulting from intrauterine vascular accidents causing segmental intestinal loss.
Full Definition
Jejunal atresia represents a complete interruption of jejunal continuity, most commonly caused by intrauterine mesenteric vascular accidents leading to segmental bowel necrosis and resorption. Unlike duodenal atresia, which results from developmental failure, jejunal atresia is an acquired condition occurring after normal intestinal development. The condition is classified into four types based on the anatomical configuration of the atretic segment. Prenatal diagnosis may be suggested by polyhydramnios and dilated bowel loops on ultrasound. Surgical correction involves resection of the atretic segment with primary anastomosis.
Usage
Usage note: Differentiate from ileal atresia by anatomical location and associated findings.
In Context
- "The neonate presented with bilious vomiting and abdominal distension due to jejunal atresia." — Emergency department consultation
- "Intraoperative findings revealed Type IIIa jejunal atresia with significant bowel length discrepancy." — Operative report