AUTOIMMUNE CHOLANGIOPATHY: ENDOSCOPIC DIAGNOSIS

Benign bile duct lesions account for up to 30% of biliary strictures. We present a case of endoscopic diagnosis of non-IgG4-mediated autoimmune cholangiopathy (AIG) associated with eosinophilic esophagitis.

EUS examination failed to provide a definitive diagnosis and ruled-out malignancy. Cholangioscopy showed a narrow and erythematous common bile duct with denuded areas. Finally, histological examination revealed a lymphoplasmacytic infiltrate withouth IgG4 and first follow up showed improvement after four weeks of prednisone.

AIG can be difficult to distinguish from malignant strictures, being cholangioscopy with biopsy an effective and safe procedure. Slim linear echoendoscope is an alternative in patients with esophageal stricture.

Publication History

Article published online:
14 April 2022