Table 1

Established final diagnosis in 312 patients who were evaluated for bile duct stenosis

Final diagnosisNo. of patients
Malignant stenosis220
 Tissue diagnosis
  Resection stenotic lesion42
  Autopsy7
  Biopsy stenotic lesion22
  Biopsy distant metastasis45
 Clinical diagnosis
  Progressive disease, consistent with   malignancy104
Benign stenosis74
 Tissue diagnosis
  Resection stenotic lesion10
 Clinical diagnosis
  Stable disease or regression64
Unknown18
 Insufficient clinical information18