Table 3.

Immune Phenotype of CD163⁺ Perivascular Macrophages

	Perivascular macrophages		Parenchymal microglia
	Control brain	Encephalitis lesion	Control brain	Encephalitis lesion
CD14	+++*	+++	−	−
CD16	+++	+++	±	++
HLA-DR	+++	+++	±	+
CD163	+++	+++	−	±

^*, −, no staining present; ±, (<5 to 10%); +, (30 to 60%); ++, (60 to 90%); +++, (>90%).