label: afferent loop syndrome
label_lc: afferent loop syndrome
description: A complication of gastrojejunostomy (billroth II procedure), a reconstructive gastroenterostomy. It is caused by acute (complete) or chronic (intermittent) obstruction of the afferent jejunal loop due to hernia, intussusception, kinking, volvulus, etc. It is characterized by pain and vomiting of bile-stained fluid.