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.