Afferent loop syndrome of a patient with recurrent fever: A case report.

Background: Afferent loop syndrome (ALS) is a rare complication, Aoki reported that the incidence of distal gastrectomy in Billroth-II is 0.3%-1.0%. The clinical manifestations of ALS are atypical, which can manifest as severe abdominal pain, vomiting, obstructive jaundice, malnutrition,

Case Summary: The patient was a 58-year-old man who complained of recurrent high fever for more than 1 week. Laboratory tests showed an increase in neutrophil ratio, procalcitonin, C-reactive protein, and abnormal liver function. Enhanced computed tomography scan of the abdomen showed small intestinal obstruction between the anastomosis of the gastrojejunum, bile duct, and pancreaticoduodenum. Gastroscopy revealed significant narrowing of the lumen 15 cm from the anastomosis into the afferent loop. After performing balloon dilation and placement of the nutrition tube, the patient did not experience further fever.

Conclusion: ALS is relatively rare after pancreaticoduodenectomy, and the treatment depends on the nature of the obstructive lesion. The traditional treatment method is surgery, and in recent years, endoscopy has provided a new treatment method for ALS.