Final answer:
The leading causes of nonalcoholic steatohepatitis (NASH) include physiological and pathological fatty livers, hepatitis, cirrhosis, and viral hepatitis.
Step-by-step explanation:
The leading causes of nonalcoholic steatohepatitis (NASH) include physiological fatty livers, pathological fatty livers, hepatitis, cirrhosis, and viral hepatitis. Physiological fatty livers can be caused by starvation, diabetes, or hormonal imbalances, leading to the accumulation of fats in the liver. Pathological fatty livers occur when the liver is unable to clear lipids, which can be caused by alcoholism, metabolic block, or liver infections. Hepatitis, both viral and non-viral, can also lead to NASH. Finally, cirrhosis, which can be caused by viral hepatitis, alcoholism, or liver-toxic chemicals, can result in progressive loss of liver function.