Haemangiomas are benign tumors that originate from the blood vessels. They occur quite regularly in older animals and are mainly on the legs, head, flanks, and in the neck. They are well defined, red, more or less round lumps, and inside there is more or less blood. When completely removed, there is usually no recurrence.
Haemangiosarcomen are malignant tumors that fortunately occur a little less often. Usually, the animals are a bit older, on average, 9-10 years. They can be anywhere in the body: Spleen, heart, liver, skin, bones, muscles, brain, and gastrointestinal tract. Haemangiosarcomen are poorly defined soft, often spongy, red masses’ masses’ 1-10cm diameter. They are very malignant and quickly spread out, usually to the lungs, but also to other places in the body. With a haemangiosarcoma in the heart, an animal can suddenly ‘stay dead’ because the heart can run wild.