Jejunal Atresia
Congenital complete obstruction of the jejunum requiring surgical resection and anastomosis.
Full Definition
Jejunal atresia is a congenital anomaly resulting in complete interruption of the jejunal lumen, thought to result from in utero vascular accidents causing segmental bowel necrosis and resorption. Unlike duodenal atresia, jejunal atresia is not associated with chromosomal abnormalities but may be part of gastroschisis or other abdominal wall defects. Clinical presentation includes bilious vomiting, abdominal distension, and failure to pass meconium. Prenatal ultrasound may show polyhydramnios and dilated bowel loops. Surgical treatment involves resection of the atretic segment with end-to-end anastomosis, though significant length discrepancy between the proximal dilated and distal collapsed bowel may require specialized techniques.
Usage
Usage note: Unlike duodenal atresia, not associated with chromosomal abnormalities but may occur with gastroschisis.
In Context
- "Contrast study confirmed jejunal atresia with a blind-ending proximal pouch." — radiology report
- "Primary anastomosis was performed after resection of the jejunal atresia segment." — operative report