Definition: Sarcocytosarcoma, also known as sarcohemesis or sarcohemic tumor, is a rare type of cancer in which the body's immune system attacks nerve cells that are normally part of the nervous system. This can lead to damage and death of nerve cells within the spinal cord, leading to symptoms such as numbness, weakness, and pain. Sarcocytosarcoma occurs when the immune system attacks the nerves that control movement in the lower part of the