Cardiac Angiosarcoma

Overview

Cardiac angiosarcoma is an extremely rare type of cancer that starts in the cells lining the blood vessels inside the heart. It grows quickly and can make the heart work poorly. Because it is so rare, doctors usually only see a few cases in their entire career.

No, cardiac angiosarcoma is extremely rare. It makes up less than 0.1% of all heart tumors, and only about 1 in 1 million people develop it each year.

It is most often seen in adults between the ages of 30 and 60, and slightly more common in men. It can sometimes affect older adults, and it is almost never seen in children.

Symptoms

Common symptoms

• Chest pain
• Shortness of breath, especially with activity
• Feeling tired or weak
• Heart palpitations (feeling like your heart is skipping or racing)
• Swelling in the legs or belly
• Persistent cough
• Unexplained weight loss

Symptoms in children

• This condition is extremely rare in children. If it occurs, symptoms may include trouble breathing, poor feeding, irritability, or swelling in the face or limbs. These symptoms can also be caused by more common childhood illnesses, so careful medical evaluation is needed.

Symptoms in older adults

• In older adults, symptoms may be confused with normal aging or heart failure. Look out for increasing tiredness, breathlessness on light activity, new or worsening swelling in the feet and ankles, or a feeling of fullness or discomfort in the chest.

Causes

Main causes

• The exact cause is unknown. Cardiac angiosarcoma starts when cells inside the heart's blood vessels mutate (change) and grow out of control. Research is ongoing to understand why this happens.

Risk factors

• There are no proven lifestyle-related risk factors.
• Some researchers suspect previous radiation to the chest or certain chemical exposures may play a role, but this is not well established.
• Having a family history of heart tumors is rare but may slightly increase risk.

When to see a doctor

See a doctor urgently if:

• If you have new chest pain, shortness of breath, or swollen legs that get worse, see a doctor within a few days.
• If you faint, have severe pain, or cough up blood, call emergency services immediately.

Book a routine appointment if:

• If you feel unusually tired, have heart palpitations, or are losing weight without trying, make an appointment with your regular doctor.
• If you have a heart condition and your symptoms change, talk to your cardiologist.

Diagnosis

Diagnosis starts with a thorough medical history and physical exam. Your doctor will listen to your heart and ask about your symptoms. If they suspect a heart tumor, they will refer you to a heart specialist (cardiologist) and a cancer specialist (oncologist) for further testing.

Tests that may be done

• Echocardiogram – an ultrasound of the heart
• Cardiac MRI – a detailed scan of the heart
• CT scan – helps check if the tumor has spread
• PET scan – can show active cancer cells
• Biopsy – a small piece of tissue is taken to confirm the diagnosis

What to expect at your appointment

You may need several scans and a biopsy. This can take a few weeks. You will meet a team of specialists who will explain the results and discuss next steps. It is normal to feel anxious during this time – ask your healthcare team for support and bring a family member or friend to appointments if you can.

Treatment

Treatment for cardiac angiosarcoma depends on the size and location of the tumor, whether it has spread, and your overall health. Because the cancer is rare and complex, your treatment plan will be created by a team of specialists who are experienced in heart and cancer care.

Self-care at home

• Follow your treatment plan exactly as your team recommends.
• Rest when you need to, but try to stay gently active as your team advises.
• Keep a diary of your symptoms to share with your doctors.
• Eat a balanced diet and drink enough fluids unless your team says otherwise.
• Reach out to family, friends, or a counselor for emotional support.

Medical treatments

Medical treatment often includes a combination of approaches: surgery to remove the tumor if possible, chemotherapy (medicines that kill cancer cells), radiotherapy (high-energy beams to shrink the tumor), and newer targeted therapies that attack specific parts of cancer cells. Your team will explain which options are appropriate for you and will never use a specific drug without discussing it with you first.

When is surgery considered?

Surgery is most useful when the tumor is found early and is confined to one area of the heart. However, because angiosarcoma often spreads quickly, surgery is not always possible. Even when surgery is done, additional treatments like chemotherapy may be recommended to reduce the risk of the cancer returning.

Living with this condition

Living with cardiac angiosarcoma means adjusting to a new normal. You may have good days and harder days. Work closely with your healthcare team, keep all appointments, and communicate openly about how you feel physically and emotionally.

Lifestyle tips

• Avoid smoking and limit alcohol – this helps your heart work more efficiently.
• Stay as active as your energy allows – gentle walking or stretching can help your mood and circulation.
• Get enough rest, and don’t be afraid to ask for help with daily tasks.

Diet and exercise

There is no special diet for cardiac angiosarcoma, but a heart-healthy diet helps. Include fruits, vegetables, whole grains, and lean proteins. If you have swelling, your team may recommend reducing salt. Exercise should be light and based on your energy level – always check with your team before starting a new activity.

Mental health and emotional wellbeing

A cancer diagnosis can bring strong feelings like shock, fear, anger, and sadness. These emotions are completely normal. Please remember that your mental health is just as important as your physical health. Talk openly with your care team about how you are feeling – they can connect you with counseling or support groups.

Prevention

Because the exact cause of cardiac angiosarcoma is unknown, there is no known way to prevent it. Research is ongoing, but at this time it cannot be prevented.

Complications

If left untreated

• Heart failure – the tumor can weaken the heart muscle and prevent it from pumping blood effectively.
• Heart rhythm problems – the tumor can interfere with the heart's electrical signals.
• Spread of cancer – angiosarcoma can spread to the lungs, liver, lymph nodes, and other organs.
• Blood clots – these can form and travel, causing strokes or blockages.

Long-term outlook

Cardiac angiosarcoma is a serious and aggressive cancer, and it can be life-threatening. However, every person is different. New and better treatments are being developed, and some people respond well to surgery and therapy. Your healthcare team will focus on giving you the best possible quality of life and the most effective care for your situation. Hope and support are important parts of your journey – you are not alone.

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