Most liver diseases, including fatty liver, cirrhosis, primary biliary cirrhosis and primary sclerosing cholangitis, result from injury to the liver. If damage is acute (sudden) and limited, the liver commonly repairs itself by regenerating new liver cells onto the scaffolding (internal structure) left when liver cells die. Repair and full recovery occur if the person can survive long enough to allow this renewal. However, repeated damage, particularly with disruption of the liver scaffolding, leads to scarring (fibrosis) and erratic attempts at regenerating, resulting in cirrhosis.
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