A spinal tumor is an abnormal mass that has formed on or within the spine structures. There are different forms and causes such as leukemia, lymphoma, neuroblastoma and myeloma. Although they do not occur as often, tumors that develop directly on the spine or the nerves of the spinal cord itself are called primary tumors. Secondary tumors are spread to the spine from other affected areas of the body; most commonly, breast, prostate, or lung. As a tumor progresses and grows it can affect the blood vessels, spinal bones, meninges, nerve roots, and spinal cord. Symptoms can vary from a vague walking weakness to direct swelling and pain.