Pathologies Associated with Serum IgG4 Elevation

Table 1

Clinical reasons leading to IgG subclass measurement in patients with serum IgG4 elevation 𝑛=59.

	% (𝑛)
Hypogammaglobulinemia or PID suspicion	35.6% (21)
Hypergammaglobulinemia	25.4% (15)
IgG4-RD suspicion	23.7% (14)
Other	15.3% (9)

PID: primary immune deficiency; IgG4-RD: IgG4-related disease.