👉 A blastoma is a type of tumor that arises from the inner lining of a gland or organ, typically in the liver. These tumors are often benign and can be harmless to the body, but they can become invasive when they spread outside their original location. Blastomas can cause pain, tenderness, swelling, and sometimes bleeding. They can also be painful to touch due to the small, irregular surface of the tissue. The cells in blastoma tumors may have a high rate of mutation,