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Grossly:The liver is enlarged,heavy and firm.The capsule is tense. The cut surface shows alteration of brown(congested) and yellow(fatty change) colouration.The appearance is called nutmeg liver.Microscopically:the central vein and central ends of sinusoids appear dilated and congested.The liver cells in the center of each lobule undergo degeneration and necrosis while the cells at the periphery are less affected and show fatty change.Haemosidrin granules appear in kupffer cells.In advanced cases liver cirrhosis occurs.

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