👉 Hemangiosarcoma, also known as sarcomatoid hemangioma, is a type of tumor that originates from the blood vessels. These tumors are often found in the brain or other areas where the blood vessels branch and thicken, such as the brain stem or the spinal cord. Hemangiosarcomas can be benign (normal) or malignant (恶性的), depending on whether they grow rapidly or slow down. They may be caused by a genetic mutation or by exposure
