Table 3

Summary of tissue IgG, IgG2 and IgG4 plasma cell counts with IgG2:IgG, IgG4:IgG percentages and IgG2:IgG4 ratios

Group 1
IgG4 with or without systemic disease
Group 2
Non-IgG4 Orbital inflammatory disorders
Group 3
Orbital autoimmune disorders
(n=43)(n=12)(n=16)
Tissue IgG count
 Mean±SD216±80163±83169
 Range38–37318–40150–337
Tissue IgG2 count
 Mean±SD57.2±35.841.4±48.536.9±37.1
 Range7–1182–1562–153
Tissue IgG4 count
 Mean±SD139.6±61.430.1±27.2100.4±101.1
 Range19–2830–812–375
IgG2:IgG percentage
 Mean±SD26±1323±2124±14
 Range6–471–641–57
IgG4:IgG percentage
 Mean±SD64±1115±1748±24
 Range50–840–605–94
IgG2:IgG4 ratio
 Mean±SD0.44±0.261.76±2.230.76±0.67
 Range0.10–0.950.06–7.000.01–2.00