title: Mast cell types in the lymph nodes of the opossum Didelphis albiventris (Marsupialia, Didelphidae).
abstract: Using histological and histochemical techniques, we have found a unique population of mast cells in the lymphatic sinuses of lymph nodes from different anatomical regions of the opossum. The lymphatic-sinus mast cells of the medullary sinuses were numerous, and could be easily distinguished from the connective-tissue mast cells of the dermis and lymph node capsule by their larger size and their enlarged cytoplasmic granules that were also more heterogeneous in shape and staining properties.
authors.affiliation: Department of Morphology, Federal University of Minas Gerais, Belo Horizonte, Brazil.
authors.forename: H
authors.initials: H
authors.lastname: Chiarini-Garcia
authors.forename: C R
authors.initials: CR
authors.lastname: Machado
mesh_terms: D000818:Animals; D003238:Connective Tissue / Q000648:ultrastructure; D003239:Connective Tissue Cells; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005260:Female; D008198:Lymph Nodes / Q000166:cytology* / Q000648:ultrastructure; D008297:Male; D008407:Mast Cells / Q000166:cytology* / Q000648:ultrastructure; D008854:Microscopy, Electron; D009893:Opossums / Q000033:anatomy & histology*