Immune System

Thymus - Hemorrhage

    Thymus - Hemorrhage in a male F344/N rat from a chronic study. Multifocal to coalescing areas of hemorrhage are present within this involuted thymus (arrows). Numerous vessels are also congested (arrowheads).
    Thymus - Hemorrhage in a female B6C3F1/N mouse from a chronic study. Macrophages with intracytoplasmic erythrocytes (erythrophagocytosis) (arrows) are associated with the hemorrhage.


    Kristen Hobbie, DVM, PhD
    Principal Pathologist
    Huntingdon Life Sciences
    Peterborough, UK

    Susan A. Elmore, MS, DVM, DACVP, DABT, FIATP
    Staff Scientist, NTP Pathologist
    NTP Pathology Group
    National Toxicology Program
    National Institute of Environmental Health Sciences
    Research Triangle Park, NC

    Holly M. Kolenda-Roberts, DVM, PhD, DACVP
    Veterinary Pathologist
    Everett, WA


    Jerrold M. Ward, DVM, PhD, DACVP, FIATP
    Veterinary Pathologist
    Global VetPathology
    Montgomery Village, MD

    Robert R. Maronpot, DVM, MS, MPH, DACVP, DABT, FIATP
    Senior Pathologist
    Experimental Pathology Laboratories, Inc.
    Research Triangle Park, NC