Canine hemangiosarcoma is a highly malignant cancer that most commonly affects the spleen and the heart. It spreads rapidly, causing soft tissue tumors, and in many cases it is at an advanced stage before the cancer is detected. Though this type of cancer can affect all dogs, older, large breed dogs are the most susceptible to it. Understanding the symptoms can allow for a life-saving fast diagnosis.
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Weakness
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Does your dog seem listless, or does he seem to collapse with exhaustion after any sort of exertion? Canine hemangiosarcoma takes a heavy toll on a dog's energy, and he may need to spend a lot of time recovering from activities that were once not a problem. Weakness in your dog is a good reason to take him to the veterinarian.
Weight Loss
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Cancer causes weight loss in dogs just as it does in humans, and for the same reason. Cancer can inhibit your dog's ability to take nutrition from his food, and if he is eating normally but losing weight, it is time to investigate. A dog who is in pain from hemangiosarcoma might also be uninterested in food.
Fast Heart Rate
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A fast heart rate is associated with hemangiosarcoma because the cancer causes the dog's body to work harder to maintain its normal functions. In many cases, a fast heart rate will be paired with quickened breathing due to the same reason.
Visible Bleeding
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If your dog is bleeding from the nose, and you cannot see a scratch or cut that would cause it, it might be a sign that a tumor has ruptured. Ruptured tumors can be very serious and require immediate treatment. Some dogs show no other symptoms beyond bleeding from the nose.
Pale Mucous Membranes
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Take a look at your dog's eyes and mouth. If you notice that the mucous membranes there are paler than they should be, it is a sign that you need to take your dog to the veterinarian. A discoloration in the mucous membranes can indicate that not enough oxygen is getting to the tissue.
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