Abstract Background IgG4-related disease (IgG4-RD) is an immune-mediated that may present as a tumefactive lesion in nearly any organ. These mass lesions often resemble malignancy both clinically and radiologically, some patients undergo surgical resection which could possibly be avoided with early recognition of IgG4-RD. We performed retrospective single-center study examining how many IgG4-RD...
