Dysfunction of Biliary Sphincter of Oddi-Clinical, Diagnostic and Treatment Challenges.

Biliary Sphincter of Oddi dysfunction (SOD) is one of the main causes of post-cholecystectomy pain. In this review, we aimed to provide an update on the current knowledge on biliary SOD, with an emphasis on diagnostics and therapy. Overall, current but scarce data support biliary sphincterotomy for patients with type 1 and 2 SOD, but not for type 3. However, sphincterotomy is associated with post-treatment pancreatitis rates of from 10% to 15%, thus calling for improved diagnostics, patient selection and treatment modalities for SOD. The role of pharmacologic therapy for patients with SOD is poorly explored and only two randomized controlled trials are available. Currently, studies comparing treatment outcomes are few. There is an unmet need for randomized sham/placebo-controlled clinical trials related to both pharmacological and non-pharmacological treatments of SOD.