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Auxiliary human hepatic homograft 22 days after transplantation (case 1). The portal tract (arrow) is infiltrated by mononuclear cells and several of the smaller bile ducts contain casts. There is central cholestasis, excess lipofuscin in the central hepatocytes, and atrophy of the liver cells adjacent to the central vein (lower right) (hematoxylin and eosin, ×80).
