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Hemorrhagic effusion. Cat. Same case A-B.
A, Several moderately foamy macrophages contain variable amounts of blue-grey, finely granular pigment, presumed to be hemosiderin. Also noted are two mildly basophilic and granular mesothelial cells, likely reactive. (Modified Wright; HP oil.) B, Two hemosiderophages are noted filled with Prussian blue positive material, confirming it as hemosiderin. (Prussian blue; HP oil.)
