🧬 Chapter L11 – Liver Disease (Module 19)

 

Liver disease includes a range of conditions that damage the liver and affect its ability to:

• Filter toxins from the blood
• Help digestion
• Store energy and regulate metabolism

Common conditions include hepatitis, fatty liver disease, and cirrhosis.

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🧠 What Liver Disease Is

Liver disease is not one single condition. It is a group of diseases that damage liver tissue over time.

It can progress slowly or suddenly depending on the cause.

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⚠️ Symptoms

Liver disease can cause a range of symptoms:

• Jaundice (yellowing of skin and eyes)
• Dark urine
• Pale or light-coloured stool
• Abdominal pain or swelling (ascites)
• Chronic fatigue
• Itchy skin (without rash)
• Easy bruising or bleeding
• Confusion or memory problems (in severe cases)

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🧬 Causes

Liver disease can be caused by many factors:

🦠 Infections:

• Hepatitis A
• Hepatitis B
• Hepatitis C

🍺 Lifestyle factors:

• Long-term alcohol misuse
• Poor diet

⚖️ Metabolic conditions:

• Obesity
• Type 2 diabetes
• Fatty liver disease (MASLD/NAFLD)

🧪 Other causes:

• Autoimmune diseases
• Certain medications or toxins
• Chemical exposure

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📊 Stages of Liver Disease

Liver damage usually progresses in stages:

1. Inflammation (Hepatitis)

• Liver becomes swollen and irritated

2. Fibrosis

• Scar tissue begins to form
• Healthy tissue starts to be replaced

3. Cirrhosis

• Severe, permanent scarring
• Liver function becomes significantly reduced

4. Liver Failure / Cancer

• Liver can no longer function properly
• May require transplant
• High risk of complications or death

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⚠️ Risk Factors

People at higher risk include those who:

• Drink excessive alcohol
• Are overweight or obese
• Have type 2 diabetes
• Have high cholesterol
• Use shared needles
• Have unprotected sex (hepatitis risk)
• Are exposed to certain chemicals or toxins

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🧪 Diagnosis

Liver disease is diagnosed using:

• Blood tests (liver function tests)
• Imaging scans (ultrasound, CT, MRI)
• Liver biopsy (in some cases)

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🏥 Treatment

Treatment depends on the cause and stage:

💊 Medical treatment:

• Antiviral medication (for hepatitis)
• Medicines to manage symptoms

🧠 Lifestyle changes:

• Stopping alcohol use
• Healthy diet
• Weight management
• Managing diabetes or cholesterol

🏥 Advanced treatment:

• Liver transplant (in severe cases)

⚠️ Some damage (like cirrhosis) is irreversible, but progression can often be slowed.

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🔬 Key Idea

Liver disease is:

• A progressive condition affecting liver function
• Often linked to alcohol, viruses, or metabolic disease
• Can move from mild inflammation to life-threatening liver failure
• Early detection is critical for prevention and management

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🧠 Study Questions (Answers found in module text)

🔍 Understanding

1. What are the main functions of the liver?
2. What conditions are included under liver disease?
3. What is cirrhosis?

⚠️ Symptoms

4. What is jaundice and what causes it?
5. What are the common symptoms of liver disease?
6. Why might confusion occur in severe liver disease?

🧬 Causes & Risk

7. What are the main causes of liver disease?
8. What lifestyle factors increase risk?
9. How does alcohol affect the liver over time?

📊 Progression

10. What are the stages of liver disease?
11. Which stage is considered irreversible damage?

🏥 Treatment & Prevention

12. How is liver disease diagnosed?
13. What treatments can slow its progression?
14. Why is early diagnosis important?

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📌 Final Summary

Liver disease is a group of conditions that damage the liver over time, often caused by alcohol, viruses, or metabolic problems. It progresses through stages from inflammation to possible liver failure, but early diagnosis and lifestyle changes can slow or prevent serious damage.