Table 3.

The Mayo Surgical Risk Scores

Surgical score	Surgical complexity
1	No history of surgery, lower abdominal surgery only (C-section/hysterectomy/appendectomy); lap cholecystectomy only; patent portal vein
2	Partial non-occlusive PVT; significant SBP; Caudate that wraps cava without additional surgery; really obese patient
3	Cholangiocarcinoma without significant previous surgery and no need for Whipple; straight forward polycystic liver; significant pancreatitis; occlusive PVT
4	Previous major liver resection; significant upper abdominal surgery (open right nephrectomy; open gastric bypass; Whipple); more difficult polycystic liver
5	Redo OLT; likely portal vein jump graft; cholangiocarcinoma with possible Whipple; cholangiocarcinoma with previous Whipple; previous Kasai procedure