Endoscopic Nasobiliary Drainage for Type 1 Autoimmune Pancreatitis

Endoscopic Nasobiliary Drainage (ENBD) is a minimally invasive procedure used to drain bile from the biliary system to relieve jaundice or other complications caused by bile duct obstruction. A small catheter is placed through the nose into the bile duct to allow bile to flow externally or internally.

Type 1 autoimmune pancreatitis (AIP) is a form of chronic pancreatitis often associated with IgG4-related disease. It is characterized by pancreatic inflammation, swelling, and narrowing of the bile duct, which can lead to obstructive jaundice. Differentiating AIP from malignancies and managing bile duct obstruction are crucial in treatment.

Biliary drainage in type 1 AIP is necessary to relieve jaundice and assess bile duct abnormalities. It helps in distinguishing AIP from malignancies and evaluating the patient’s response to steroid therapy while minimizing invasive procedures.

In a study of 83 patients with type 1 AIP and jaundice, ENBD effectively improved liver function and provided clear bile duct visualization. It was safe, with only 2% experiencing mild complications. ENBD also helped avoid repeated ERCP procedures and confirmed steroid responsiveness. This study highlights ENBD as a useful and safe option for managing jaundice in type 1 AIP, depending on the patient’s condition and pancreatic structure.