Fatty liver disease

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Fatty liver disease (FLD), also known as hepatic steatosis and steatotic liver disease (SLD), is a condition caused by excess fat which has built up in the liver. Often there are few outward symptoms (and sometimes even none). Occasionally there may be tiredness or pain in the upper right side of the abdomen. Complications of fatty liver disease may include cirrhosis, liver cancer, and esophageal varices. The main subtypes of fatty liver disease are metabolic dysfunction–associated steatotic liver disease (MASLD) and alcoholic liver disease (ALD), with the category "metabolic and alcohol associated liver disease" (metALD) describing an overlap of the two. Until June 2023, MASLD and its more advanced form, metabolic dysfunction associated steatohepatitis (MASH), were referred to as non-alcoholic fatty liver disease (NAFLD) and non-alcoholic steatohepatitis (NASH), respectively. The change in terminology was decided in a modified Delphi process led by three large pan-national liver associations...

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