Introduction

Amyloidosis, specifically AL amyloidosis (also known as primary amyloidosis), is a rare and serious disease that occurs when an abnormal protein called amyloid builds up in organs and tissues, interfering with their normal function.

Understanding the amyloidosis definition is key to grasping this complex condition. Amyloid is not a normal part of the body. It is a misfolded protein that can accumulate in various organs like the heart, kidneys, liver, spleen, nervous system and gastrointestinal tract. This accumulation leads to organ damage and can be life-threatening if untreated.

The good news is that with early diagnosis and the right care, the progression of amyloidosis can be slowed, and symptoms can be managed, improving quality of life.

If you suspect you have unexplained fatigue, swelling or other symptoms, know that help is here for you.

Signs & Symptoms

Spotting symptoms early can make a big difference. These symptoms often depend on which organs are affected.

Common amyloid symptoms include:

If you notice these signs, especially a combination of them, talk to your specialist.

Causes & Risk Factors

Amyloidosis happens when the body produces abnormal proteins that misfold and accumulate as amyloid fibrils. The specific cause varies depending on the type.

Key amyloidosis causes:

Knowing the specific causes helps you and your specialist find the right treatment plan for your condition.

Diagnosis

An accurate diagnosis will confirm if you have amyloidosis and determine the next steps for treatment.

Types of Amyloidosis

Amyloidosis is classified based on the type of misfolded protein involved and the organs or tissues where these abnormal proteins accumulate.

1. AL Amyloidosis (Primary Amyloidosis)

  • Cause: Caused by abnormal plasma cells in the bone marrow that produce excess immunoglobulin light chains. These light chains misfold and form amyloid deposits.

  • Affected areas: Can involve multiple organs, especially the heart, kidneys, nerves, liver and gastrointestinal tract.

  • Symptoms: Swelling in legs, shortness of breath, fatigue, foamy urine (from kidney involvement) and numbness or tingling in hands or feet.

2. AA Amyloidosis (Secondary Amyloidosis)

  • Cause: The liver produces excessive amounts of serum amyloid A (SAA) protein, which misfolds and deposits as amyloid.

  • Common conditions linked: Rheumatoid arthritis, inflammatory bowel disease, chronic infections (e.g., tuberculosis).

  • Affected areas: Primarily the kidneys, but can also involve the liver, spleen and adrenal glands.

  • Symptoms: Protein in the urine, kidney dysfunction, fatigue and unintentional weight loss.

3. ATTR Amyloidosis (Transthyretin Amyloidosis)

  • Cause: Caused by the misfolding of the transthyretin (TTR) protein, which is produced by the liver.

  • Subtypes:
    • Hereditary ATTR (familial amyloidosis): Caused by mutations in the TTR gene.

    • Wild-type ATTR (previously called senile amyloidosis): Occurs without genetic mutation, usually in older adults (especially men).

    • Affected areas: Mainly affects the heart (restrictive cardiomyopathy), but also the nervous system.

    • Symptoms: Heart failure, irregular heart rhythm, carpal tunnel syndrome, and peripheral neuropathy.

4. Dialysis-Related Amyloidosis (Aβ2M Amyloidosis)

  • Cause: Caused by the accumulation of beta-2 microglobulin, a protein not effectively cleared by dialysis.

  • Affected individuals: Seen in people undergoing long-term haemodialysis.

  • Affected areas: Tends to affect joints, bones and tendons.

  • Symptoms: Joint pain, stiffness, bone cysts and carpal tunnel syndrome.

5. Localised Amyloidosis

  • Cause: The abnormal protein is produced in and confined to one part of the body.

  • Affected areas: Can occur in the bladder, skin, lungs, larynx, or gastrointestinal tract.

  • Symptoms: Depends on the site — may include hoarseness, bleeding, or localised swelling.

Identifying the type of amyloidosis helps your specialist determine the underlying cause, assess organ involvement and create an individualised treatment plan. Early and accurate diagnosis can improve outcomes and quality of life.

Treatments

Treatment focuses on stopping the production of the abnormal protein, removing existing amyloid deposits, and managing organ damage.

Key treatment elements:

When managed properly, people with amyloidosis can have improved outcomes and quality of life.

Ready to learn what might help you? Learn more about amyloidosis treatments on this treatment page.

Complications

Without treatment, amyloidosis can lead to:

Understanding your condition and sticking to treatment can help prevent severe complications and manage amyloid symptoms.

Prevention

While you cannot prevent the development of amyloidosis itself, you can lower the risk of severe complications by:

With the right precautions and awareness, many people with amyloidosis can lead full, active lives while managing the disease.

Living with Amyloidosis

Living well means managing your condition day to day:

Navigating Amyloidosis in Singapore

The Problem and Types of Conditions

Amyloidosis refers to a group of rare disorders where abnormal protein deposits, known as amyloid, build up in organs and tissues. These deposits can affect the heart, kidneys, liver, nerves, or digestive system, leading to a wide range of symptoms such as fatigue, shortness of breath, swelling and weight loss.

The condition can be hereditary or acquired, and early recognition is important as untreated amyloidosis may lead to progressive organ damage.

Consultation to Ongoing Care

For patients managing amyloidosis in Singapore, care usually begins with a consultation involving blood tests, imaging scans and sometimes a biopsy to confirm the diagnosis. Based on the type and severity, treatment may include medications to reduce amyloid production, supportive therapies to protect organ function, and, in some cases, stem cell transplant or chemotherapy.

Ongoing care often involves regular follow-ups to monitor symptoms, adjust treatment and ensure the patient’s quality of life is maintained. Patients can expect a coordinated approach where specialists such as haematologists, cardiologists and nephrologists work together in long-term management.

When to Seek Help

Patients should seek medical attention if they notice persistent unexplained symptoms such as swelling of the legs, unusual bruising, tingling in the hands or feet, or significant fatigue. Since amyloidosis can mimic other more common conditions, seeing a specialist for an early assessment helps rule out other causes and ensures timely treatment. Seeking help early improves the chances of slowing progression and maintaining daily function.

Find an Amyloidosis Specialist in Singapore

You do not have to manage amyloidosis alone. A specialist can help monitor your condition, adjust medication and plan for emergencies, ensuring you receive appropriate care for your specific type of amyloidosis.

If you or someone you love has unexplained fatigue, swelling or other amyloidosis symptoms, book a consultation to get clear answers. 

Take the first step toward stable health and peace of mind.

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