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Figure 5a. (a) Transverse section of mammary tissue from the subacute animal shows distinct demarcation (circular outline) between central necrotic tissue and hemorrhagic rim (bar = 1 cm). (b) Photomicrograph obtained in the subacute animal shows necrotic tissue containing clear edema and scattered neutrophils (upper half of image) bordered by free blood at the lower margin of image (hemorrhagic rim). (Hematoxylin-eosin stain; original magnification, x200.)