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Figure 7. Photomicrographs of tissue collected at autopsy and stained with the Masson trichrome technique provide an overview of the histologic results of embolization. A, B, Tissue from the right lobe (A, nonembolized) and left lobe (B, embolized) obtained 4 days after embolization of the portal vein branches supplying the left and median lobes in animal 6. C, D, Tissue from the right lobe (C, nonembolized) and left lobe (D, embolized) obtained 12 days after embolization of the portal vein branches supplying the left and median lobes in animal 4. The hepatic lobules (L) are normal in the right lobe (A and C). After embolization, changes seen in the left lobe (B and D) include fibrosis (arrows) separating atrophic lobules. (Original magnification, x50.)