Table 5.

Usefulness of bile duct biopsy for the diagnosis of IgG4‐SC

Author	Number of cases involving bile duct biopsy	Number of cases involving histologic diagnosis	Sensitivity
Ghazale et al. 16	16	14	88%
Kawakami et al. 99	29	15	52%
Naitoh et al. 20	17	3	18%
Hirano et al. 25	5	0	0%