A Case Report of an Atypical Presentation of IgG4-Related Disease and Idiopathic CD4 Lymphocytopenia

Table 1

Main laboratory data.

	2008; after steroids administration	2013	2014; before steroids administration	2014; 1 month after steroids administration	2014; 3 months after steroids administration
Serum creatinine, mg/dL	1.40	1.80	2.08	1.60	1.52
GFR, mL/min/1.73 m^2	59	43	36	49	52
Proteinuria, mg/24 h	924	342	350		200
ANA		2.9	neg
Anti-dsDNA		neg	neg
pANCA		neg	neg
cANCA		neg	neg
C3, mg/dL		7.3	63	67
C4, mg/dL		2.9	3	6
Circulating immune complexes (μg equiv./mL)	>100
Rheumatoid-factor, UI/mL; normal <20 UI/mL	80		217	24
ESR, mm/h			117	35
Glycosuria, mg/24 h	3540
Total IgG, mg/dL	3480		4260	1900	955
IgG1, mg/dL	2670		1470	1190	554
IgG2, mg/dL	821		429	316	247
IgG3, mg/dL	100		126	48	24
IgG4, mg/dL	1380		185	185	185

GFR, glomerular filtration rate.