Fatty liver disease (also called hepatic steatosis) is a condition where excess fat accumulates in liver cells. There are two main types: NAFLD/MASLD (non-alcoholic/metabolic, linked to obesity, insulin resistance, and metabolic syndrome) and ALD (alcoholic liver disease). It ranges from simple steatosis to steatohepatitis, fibrosis, cirrhosis, and hepatocellular carcinoma. Many people have no symptoms early on; it's often found incidentally on imaging or via elevated liver enzymes.

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