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Aim   The frequency of the Right Posterior Sectional Bile Duct (RPSBD) hump sign in cholangiogram when it crosses over the right portal vein known as Hjortsjo Crook Sign and the bile duct anatomy are studied. Knowledge of the implication of positive sign can facilitate safe resection for both bile duct and portal vein.Methods   Prospectively, we included 237 patients with indicated ERCP during a period from March 2010 to January 2015.Results   The mean age (±SD) and male to female ratio were 38.8 (±19.20) and 1 : 1.28, respectively. All patients are Arab from Middle Eastern origin, had biliary stone disease, and underwent diagnostic and therapeutic ERCP. Positive Hjortsjo Crook Sign was found in 17.7% (42) of patients. The sign was found to be equally more frequent in Nakamura's RPSBD anatomical variant types I, II, and IV in 8.4% (20), 6.8% (16), and 2.1% (5), respectively, while rare anatomical variant type III showed no positive sign.Conclusion   Hjortsjo Crook Sign frequently presents in RPSBD variation types I, II, and IV in our patients.

The Prevalence of Hjortsjo Crook Sign of Right Posterior Sectional Bile Duct and Bile Duct Anatomy in ERCP