When people mention fatty liver, the first reaction must be that overweight people are prone to fatty liver, while for a person with a normal body mass index, if he is told that he has fatty liver, his first reaction must be “I am not fat, how can I have fatty liver?”. . What we people understand as “fatty liver” is related to fat, while the medical term is non-alcoholic fatty liver disease, a metabolic disease that can lead to cirrhosis and liver cancer in severe cases. It is true that this disease is more often seen in obese and overweight people, but, in fact, even in people of normal weight, there is a certain percentage of “fatty liver”. At the recent 66th Annual Meeting of the American Liver Association in the United States, researchers from the University of Hong Kong found that about one-fifth of the normal-weight population has a “fatty liver” and that this group of people may have more serious disease and more severe disease. The size of the polyp affects the prognosis and the likelihood of cancer. Larger polyps (7 mm) are more likely to increase in size during follow-up than polyps of 5 mm in diameter. Polyps larger than 10 mm in diameter are more likely to be malignant or have the potential to become cancerous. Most gallbladder polyps tend to be malignant, with only a few being adenomatous. In addition, it is still difficult to diagnose gallbladder polyps with ultrasound, and many of those diagnosed as gallbladder polyps are actually stones or cholesterol polyps in the gallbladder wall. Polyps smaller than 5 mm are “almost negligible,” while polyps larger than 10 mm or progressively larger should be removed from the gallbladder, and polyps between 5 and 10 mm should be followed up. It is recommended that polyps smaller than 10 mm should be surgically removed in younger patients who cannot be guaranteed long-term follow-up monitoring. Finally, the investigators suggest that “all gallbladder polyps showing a predisposition to malignancy need to be discussed in meetings of the hepatobiliary team to enhance and standardize treatment options for this condition.” Poor prognosis. In the study, a total of 911 subjects were included, of whom 701 had a BMI less than 25 and 210 had a BMI greater than 25, resulting in 19.3% “fatty liver” in the non-obese population and 60.5% in the obese population. Increased waist circumference, insulin resistance, decreased HDL levels, increased triglyceride and ferritin levels are all high risk factors for developing “fatty liver” in non-obese people. Researchers believe that this group of people should not worry too much, if there is no other metabolic risk, through lifestyle modification can improve or even eliminate “fatty liver”.