Incidences of K-ras mutations in patients with primary sclerosing cholangitis (PSC) with or without ulcerative colitis (UC)
| PSC | PSC and UC | PSC without UC | Control group |
| 17/56 | 7/20 | 10/36 | 0/20 |
| 30% | 35% | 27% | 0% |
| p=0.39 | |||
UC, ulcerative colitis diagnosed by clinical and endoscopic evaluation. Control group comprised patients with benign bile duct strictures after liver transplantation (n=11), choledocholithiasis (n=5), liver cirrhosis (n=3), and Budd-Chiari syndrome (n=1).