title: Close Encounters of the Tertiary Kind.
abstract: Elucidating the function of tumor-infiltrating regulatory T (Treg) cells has been difficult. In this issue of Immunity, Joshi et al. (2015) demonstrate that Treg cells associated with murine lung cancers are found within tertiary lymphoid structures and actively restrain effector T cells at the tumor site.
authors.affiliation: Department of Pathology, University of Chicago, Chicago, IL 60637, USA.
authors.forename: Victoria
authors.initials: V
authors.lastname: Lee
authors.affiliation: Department of Pathology, University of Chicago, Chicago, IL 60637, USA. Electronic address: psavage@bsd.uchicago.edu.
authors.forename: Peter A
authors.initials: PA
authors.lastname: Savage
mesh_terms: D000818:Animals; D016246:Lymphocytes, Tumor-Infiltrating / Q000276:immunology*; D009369:Neoplasms / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D050378:T-Lymphocytes, Regulatory / Q000276:immunology*