Table 4.

IgG4-positive plasma-cell-rich ANCA-related vasculitis.

Pt. no.	Age/gender	Diagnosis	PC infiltration	IgG4/hpf	IgG4/CD138 ratio (%)
1	75/F	CSS	++	19	47
2	59/M	mPA	++	22	52
3	79/F	mPA	+++	34	78
4	67/F	RLV	++	19	69

Abbreviations: CSS: Churg-Strauss syndrome; hpf: high-power field; mPA: microscopic polyangiitis; PC: plasma cell; RLV: renal limited vasculitis.