CONCLUSION
IgG4-SC is a steroid-sensitive immune-mediated fibroinflammatory
disorder that should be considered as one of the differentials in
patients with biliary strictures. The clinical and the radiographical
findings of this disease might mimic that of cholangiocarcinoma but low
levels of tumor markers and high levels of serum IgG4 should prompt
consideration of IgG4-SC, as this entity responds well to medical
therapy thus, obviating the need for surgery.