Figure 1: Aspirate of a pectoral mass in a horse


The aspirate was cellular and contained a mixture of inflammatory cells, many of which ere caught up within clots. At this low magnification, multinucleated giant cells, with hemosiderin in their cytoplasm (arrows), stand out, as do hemosiderin-containing macrophages (arrowheads) (20x objective, modified Wright’s stain).

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