Microenvironment to a lymphoid cell is nothing more than interaction with its neighbours.
D001402:B-Lymphocytes / Q000276:immunology*; D002462:Cell Membrane / Q000276:immunology; D007109:Immunity; D008198:Lymph Nodes / Q000276:immunology; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*; D013950:Thymus Gland / Q000276:immunology