Table 1.

Sphincter of Oddi Dysfunction

Type I

1 Typical biliary-pancreatic pain

2 Liver chemistries (total bilirubin, alkaline phosphatase, transaminases) ≥ 1.5-2X ULN and/or pancreatic chemistries (amylase and/or lipase) ≥ 1.5-2X ULN

3 Dilated common bile duct (≥ 12 mm) or pancreatic duct (head ≥ 6 mm, body ≥ 5 mm) diameter

4 Prolonged biliary drainage (> 45 min) with patient in supine position or pancreatic drainage (> 9 min) with patient in the prone position

Type II

1 Typical biliary-pancreatic pain

2 Positive findings for one or two items (2, 3, or 4) from type I

Type III

1 Typical biliary-pancreatic pain and no other abnormalities

Modified from Sherman et al[25].