Spectrum of the different causes of extrahepatic biliary stenosis in 298 patients with a final diagnosis
| Aetiology | Number of patients (N = 298) |
|---|---|
| Malignant stenosis | 223 (75%) |
| Pancreatic carcinoma | 98 |
| Bile duct carcinoma | 73 |
| Gall bladder carcinoma | 7 |
| Ampullary carcinoma | 8 |
| Lymph node metastasis | 11 |
| Lymphoma | 1 |
| Unspecified | 25 |
| Benign stenosis | 75 (25%) |
| Inflammatory | |
| Chronic pancreatitis | 27 |
| Cholelithiasis | 3 |
| Mirizzi syndrome | 1 |
| Primary sclerosing cholangitis | 26 |
| Postsurgical | 13 |
| Unspecified | 5 |