Fig. 2From: Rosai–Dorfman disease mimicking IgG4-related diseases: a single-center experience in ChinaProportion of different isotypes of IgG to total IgG in serum in RDD mimic IgG4-RD group and IgG4-RD group. IgGX refers to IgG1/2/3/4. RDD mimic-IgGX: serum IgGX to IgG in RDD mimic IgG4-RD group. IgG4-RD-IgGX: serum IgGX to IgG in IgG4-RD group.Back to article page