IgG4-Related Lymphadenopathy

Table 1

Histological subtypes of IgG4-related lymphadenopathy.

	Histological type	Distribution of IgG4^+ plasma cells	Lymphadenopathy
I	Multicentric Castleman’s disease-like	Interfollicular	Systemic
II	Reactive follicular hyperplasia-like	Interfollicular	Localized
III	Interfollicular expansion and immunoblastosis	Interfollicular	Systemic
IV	PTGC-type	Intragerminal center	Localized/systemic
V	Inflammatory pseudotumor (IPT-) like	Interfollicular	Localized

PTGC; progressively transformed germinal centers.