Pet Health

Hemangiosarcoma in Dogs

Discover everything you need to know about hemangiosarcoma in dogs, including symptoms, diagnosis, treatment options, and how to support your furry friend.
Author: Veterinary Team
Dial A Vet
Updated
June 6, 2025
|
Published
June 6, 2025
A veterinarian examining a dog with hemangiosarcoma, highlighting symptoms and treatment options.

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Seeing your dog sick is never easy, especially when the diagnosis is something as serious as hemangiosarcoma. This aggressive cancer can be frightening for pet owners, but understanding the condition and knowing how to act can make all the difference. Let’s break down what hemangiosarcoma is, what signs to look for, and how you can support your dog through this tough diagnosis.

⚠️ What to Watch For

Hemangiosarcoma often develops silently, making it difficult to detect until it has progressed. This cancer commonly affects the spleen, liver, heart, or skin, and its symptoms can vary depending on the organ involved. Here are some signs to keep an eye on:

  • Sudden weakness or collapse
  • Pale gums
  • Distended abdomen (a sign of internal bleeding)
  • Loss of appetite
  • Unexplained weight loss
  • Fatigue or lethargy
  • Difficulty breathing

It’s important to note that some dogs may show no symptoms at all until a critical event, such as a rupture of a tumor, occurs. This makes routine vet check-ups crucial for early detection.

🔍 Possible Causes

Hemangiosarcoma is a type of cancer that originates in the blood vessel walls. While the exact cause is not always clear, several factors can increase the risk:

  • Breed predisposition: German Shepherds, Golden Retrievers, and Labrador Retrievers are more commonly affected.
  • Age: This cancer is more frequently diagnosed in older dogs, typically over 8 years old.
  • Genetic factors: Some dogs may inherit a predisposition to developing cancer.

Unfortunately, hemangiosarcoma is not preventable, but understanding the risks can help pet owners stay vigilant.

✅ What You Can Do at Home

While hemangiosarcoma is a serious condition, there are ways you can provide comfort and support for your dog at home:

  • Ensure they have a quiet, stress-free environment.
  • Offer a high-quality, balanced diet tailored to their needs.
  • Monitor their activity levels and avoid overexertion.
  • Keep a close eye on any symptoms, such as changes in appetite or energy levels.
  • Administer any medications prescribed by your vet as directed.

At-home care focuses on improving your dog’s quality of life and ensuring they feel as comfortable as possible.

💡 When to Call a Vet

Hemangiosarcoma is a medical emergency when complications like internal bleeding arise. Seek immediate veterinary care if you notice any of the following:

  • Sudden collapse
  • Severe weakness
  • Difficulty breathing
  • Abdominal swelling
  • Uncontrolled bleeding from the skin

Your vet may recommend diagnostic tests such as blood work, X-rays, ultrasounds, or a biopsy to confirm the diagnosis. If hemangiosarcoma is identified, your vet will discuss treatment options, which may include surgery, chemotherapy, or palliative care.

Remember, early intervention can make a significant difference in managing this condition.

FAQs

Q: Can hemangiosarcoma in dogs be cured?
A: Hemangiosarcoma is challenging to cure due to its aggressive nature and tendency to spread. Treatment often focuses on extending the dog’s life and improving their quality of life.

Q: How long can a dog live with hemangiosarcoma?
A: Life expectancy depends on factors like the location of the tumor and the treatment approach. Without treatment, survival time is often weeks to months. With surgery and chemotherapy, some dogs may live several months to a year or more.

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References

While every effort is made to ensure the accuracy of this content - including vet review where applicable - this article is for informational purposes only and is not a substitute for professional veterinary advice, diagnosis, or treatment. If your pet is unwell or you are concerned, please speak with a licensed veterinarian. You can book a $49 online consultation with our veterinary team  😄
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