[DIFFERENTIAL MANAGEMENT AT THE SPHINCTER OF ODDI DYSFUNCTION AFTER CHOLECYSTECTOMY]

Area of Science:

• Gastroenterology and Hepatology
• Surgical Management
• Diagnostic Imaging

Background:

• Sphincter of Oddi dysfunction (SOD) is a potential complication following cholecystectomy.
• Differentiating functional SOD from organic biliary pathology is crucial for appropriate patient management.
• Accurate diagnosis impacts treatment decisions and patient outcomes.

Purpose of the Study:

• To develop and validate a differential management strategy for patients with suspected SOD post-cholecystectomy.
• To establish a scoring system to distinguish between functional and organic causes of biliary outflow issues.
• To guide the selection of patients for further invasive investigations and surgical intervention.

Main Methods:

• A cohort of 169 patients post-cholecystectomy with suspected SOD was analyzed.
• Patients were divided into two groups: those with suspected organic causes (n=60) and suspected functional SOD (n=109).
• Clinical, laboratory, and ultrasound data were used for a multivariate analysis scoring system; hepatobiliary scintigraphy (GBSG) and advanced imaging (CT, MRI, ERCP) were employed for diagnosis.

Main Results:

• The organic pathology group scored ≥4 points, with GBSG showing cholestatic outflow in all assessed patients.
• The suspected functional SOD group scored 2-3 points (p < 0.05), with GBSG revealing normal, cholestatic, or accelerated bile outflow in different proportions.
• Further investigation identified latent organic disorders in 9% of the suspected functional SOD group, necessitating surgery.

Conclusions:

• A validated scoring system effectively differentiates patients with suspected SOD post-cholecystectomy, guiding management decisions.
• The scoring system helps identify patients with predominantly functional disorders, while also detecting a subset with underlying organic pathology.
• Accurate differentiation using this scoring system and subsequent investigations leads to appropriate surgical treatment for patients with latent organic changes.