Table 1.

Case	Clinical presentation	Initial diagnosis	Treatment	Serum IgG4 level
1	Paravertebral mass	Inflammatory myofibroblastic tumor Idiopathic retroperitoneal fibrosis	Oral cyclophosphamide Mycophenolate mofetil Steroid and rituximab	0.604 mg/dl (after treatment) Pretreatment level is not available
2	Parotid mass Pachymeninges	Inflammatory pseudotumor Non-Hodgkin's lymphoma	Steroid and rituximab Proton therapy	14.2 mg/dl after steroid treatment Pretreatment level is not available
3	Proptosis Lacrimal and salivary gland swelling	Mikulicz syndrome	Steroid and azathioprine	340 mg/dl Pretreatment level
4	Recurrent pancreatitis	Ampullary adenoma	Whipple's procedure Steroid and rituximab	149 mg/dl Pretreatment level