![Fatty Liver Disease](media/images/service/disease-fatty-liver.jpg)
Fatty Liver Disease
Gastroenterology Hepatology
Fatty Liver Disease, formerly known as Steatohepatitis, is a condition in which the liver accumulates fat in excess of 5% of its own mass. Fatty liver disease is an increasingly common urban disease in Hong Kong, with one in four people suffering from fatty liver disease[1]. Fatty liver disease can be classified into two main categories: alcoholic fatty liver disease and non-alcoholic fatty liver disease. A local university study estimated that there are over 100,000 new cases of NAFLD in Hong Kong each year, which is a cause for concern.[2]
Symptoms
Fatty Liver Disease has no visible symptoms after the onset of the disease and it is difficult to realise that your body has turned on the red light. This silent warning sign means that a person may have fatty liver for 10 to 15 years without realising it.
However, when the disease worsens and the liver becomes more inflamed, some patients may experience the following symptoms:
- Fatigue
- Weakness
- Jaundice
- edema
- unexplained weight loss
- Right upper abdominal tenderness
Long-term health effects of Fatty Liver Disease:
As fatty liver does not show any obvious symptoms, if it worsens, it can lead to chronic inflammation of the liver. This chronic inflammation damages the liver and weakens liver function. In the early stages of the disease, fatty liver can be reversed. However, if the warning signs are not dealt with, the chronic inflammation will continue to damage liver function and cause liver fibrosis, which in severe cases can lead to cirrhosis, liver failure and even liver cancer.
In addition, Non-alcoholic fatty liver disease (NAFLD) increases the risk of other diseases, especially cardiovascular diseases (e.g. heart disease, stroke), diabetes, hypertension, high cholesterol and metabolic syndrome.
Causes and Risk Factors
Fatty liver can be caused by a variety of factors, usually categorized as alcoholic fatty liver due to excessive alcohol intake and non-alcoholic fatty liver due to other factors. These factors include nutritional imbalance, insulin resistance, diabetes, pregnancy, and medication side effects. Although there is still no consensus in the medical community on the causes of fatty liver, risk factors have been identified.
Alcohol is a risk factor for developing alcoholic fatty liver disease, while the following people are at high risk for developing non-alcoholic fatty liver disease:
- Over 50 years of age
- Have high blood pressure, high blood glucose, and high cholesterol (the "3 H's")
- Have metabolic syndrome
- Have smoking habit
- Obese / overweight
Lifestyle habits are closely related to fatty liver. Alcohol, smoking and obesity are all controllable risk factors, and those who are concerned about fatty liver should adopt healthy lifestyle habits.
Diagnosis
- Review the patient's symptoms, lifestyle and medical history, and perform a palpation test.
- Generally, liver function is checked by blood test first, followed by imaging or other tests (e.g. ultrasound, electron scan, magnetic resonance imaging) depending on the patient's condition.
- Common imaging tests (ultrasound) can detect fatty liver but cannot detect the percentage of liver fat and liver damage after inflammation.
- Depending on the patient's condition, some patients may need to have liver tissue extracted for diagnosis.
Advantages | Disadvantages | |
Ultrasound/Electronic Scanning/Magnetic Resonance Imaging (MRI) |
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Liver fibrosis scan (FibroScan®) |
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Liver Biopsy |
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Treatment
There is no specific drug or surgical treatment for fatty liver. Certain vitamins or supplements may reduce liver damage in an inflamed state, but they cannot cure the liver. The human liver has a very strong ability to repair itself and fatty liver in the early to mid-stage can still be reversed and the patient can start to improve his or her lifestyle.
For patients with alcoholic fatty liver disease:
- Alcohol cessation
For non-alcoholic fatty liver patients:
- Change dietary habits and reduce excessive sugar intake.
- Regular exercise to improve metabolism
- Proper weight management
- Reduce alcohol intake
Preventive screening
Prevention of fatty liver is more important than treatment. Fatty liver is more likely to occur in centrally obese people, but the two are related but not the same, as people of average or even thin stature may have an insidious case of fatty liver.
Fatty liver is a disease with hidden symptoms. Therefore, it is through liver screening that we can detect the disease and take preventive measures.
The following people who are at higher risk of developing NAFLD are recommended to have their liver fat levels checked regularly for early follow-up:
- Aged over 50
- Have high blood pressure, high blood sugar and high cholesterol (the "3 H's").
- Suffer from metabolic syndrome
- Have insulin resistance
- Obesity/heavy weight, increased waist size
The most effective way to prevent fatty liver disease is to avoid the above risk factors through lifestyle. A balanced diet should be maintained, with adequate intake of nutrients, while avoiding excessive intake of foods with refined sugar or refined starch. At the same time, it is recommended to cultivate the habit of exercising to enhance the metabolic rate and promote the body's fat elimination mechanism, so as to reduce the accumulation of fat in the body, including the liver.
FAQ
Footnote
- Faculty of Medicine, The Chinese University of Hong Kong - CUHK Study Reveals Over 100,000 New Non-alcoholic Fatty Liver Diseases in Hong Kong Each Year
https://www.med.cuhk.edu.hk/tc/press-releases/cuhk-latest-research-reveals-over-100000-new-non-alcoholic-fatty-liver-cases-in-hong-kong-annually - Faculty of Medicine, The Chinese University of Hong Kong - CUHK Study Reveals Fatty Liver Disease Is Not Unique to Obese People https://www.med.cuhk.edu.hk/tc/press-releases/cuhk-reveals-non-alcoholic-fatty-liver-disease-afflicts-even-the-non-obese
Reference
- Over 1 in 4 Hong Kong Adults Suffer from Fatty Liver Disease The situation should not be overlooked CUHK Launches First Non-invasive Liver Fatty Screening Test to Facilitate Early Diagnosis | The Chinese University of Hong Kong - LIVER READING
https://livercenter.com.hk/article/逾四分一成年港人患有脂肪肝-情況不容忽視-中大首推無創肝脂肪檢查-助患者及早診斷/ - Fatty Liver Disease] Is Fatty Liver Disease Related to Diabetes and Central Obesity? Understand the causes, risk factors, and do 4 things to reverse the situation - Ming Pao Health Net
https://health.mingpao.com/脂肪肝-本港四分一人患脂肪肝-與糖尿病-中央肥胖/ - Fatty Liver Test! What to do: Causes and Treatment of Fatty Liver Disease | The Chinese University of Hong Kong - Liver Reading
https://livercenter.com.hk/article/驗出脂肪肝!怎麼辦:脂肪肝的成因和治療/ - What is Fatty Liver? Definition, symptoms, causes, diagnosis, treatment - Hello Doctor
https://helloyishi.com.tw/stomach/liver-diseases/fatty-liver/ - What are the causes of fatty liver? What should I pay attention to in my diet?
https://www.edh.tw/article/15623 - 4 Tips to Eliminate Fatty Liver Diet, Fatty Liver Symptoms, Causes and Treatments - Health Magazine
https://www.commonhealth.com.tw/article/84418 - What is Fatty Liver? - Fatty liver, Fatty liver formation, Fatty liver test, Fatty liver treatment
https://virtusmedical.com/health-tips/fatty-liver?locale=zh_hk - What is Fatty Liver? How to prevent and eliminate fatty liver? Learn these 2 tips! - Health Specialist
https://www.healthsp.org/article/fatty_liver - 4 stages of liver disease: inflammation, fibrosis, cirrhosis, liver failure - Dr. Hello
https://helloyishi.com.tw/stomach/liver-diseases/four-stages-of-liver-disease/ - 4 Symptomatic Judgements to Predict Liver Disease? - Health Magazine https://www.commonhealth.com.tw/article/63655
- Symptoms & Causes of NAFLD & NASH - NIDDK
https://www.niddk.nih.gov/health-information/liver-disease/nafld-nash/symptoms-causes - Nonalcoholic Fatty Liver Disease and Cardiovascular Risk
https://www.ahajournals.org/doi/10.1161/ATV.0000000000000153 - CUHK study reveals over 100,000 new cases of non-alcoholic fatty liver disease in Hong Kong each year
https://www.med.cuhk.edu.hk/tc/press-releases/cuhk-latest-research-reveals-over-100000-new-non-alcoholic-fatty-liver-cases-in-hong-kong-annually - CUHK Study Reveals Fatty Liver Problem Not Unique to Obese People
https://www.med.cuhk.edu.hk/tc/press-releases/cuhk-reveals-non-alcoholic-fatty-liver-disease-afflicts-even-the-non-obese - Non-alcoholic fatty liver disease (NAFLD) - NHS
https://www.nhs.uk/conditions/non-alcoholic-fatty-liver-disease/ - European Association for the Study of the Liver (EASL); European Association for the Study of Diabetes (EASD); European Association for the Study of Obesity (EASO). EASL-EASD-EASO Clinical Practice Guidelines for the management of non-alcoholic fatty liver disease. J Hepatol. 2016 Jun;64(6):1388-402. doi: 10.1016/j.jhep.2015.11.004. Epub 2016 Apr 7. PMID: 27062661.
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