. 2021 Nov 11;72(1):43–52. doi: 10.1111/pin.13185

Table 1.

The 2020 exclusion criteria for IgG4‐related disease

Clinical findings
Continuing elevated serum level of CRP (≧1.0 mg/dL)^a Elevated serum level of IgA^b Elevated serum level of IgM^b
Pathological findings
Sheet‐like proliferation pattern of mature plasma cells
High degree of hemosiderin deposition
Neutrophilic infiltration

Note: Cases that are present with any one of the clinical or pathological findings listed below cannot be categorized as definite IgG4‐RD, although they may meet the diagnostic criteria for IgG4‐RD.

^{^a}

Continuing elevation of uncertain cause.

^{^b}

Serum level above normal range is defined as “elevated.” Reference value of each institution should be applied.

Ref. 10.