The survival rate for people with appendix cancer is directly linked to the size of the tumor when it is found. If the tumor is small the patient is more likely to survive, states the MD Anderson Center.
Tumors that are smaller than 2 centimeters in diameter can be removed and are not likely to spread to other organs; patients have a good 5-year survival rate. Patients with appendix tumors bigger in diameter than 2 1/2 centimeters have a lower survival rate, but in some cases aggressive treatment is available. Appendiceal cancer is rare, with only 600 to 1,000 cases diagnosed each year, notes Shoot Out Cancer. Not all appendix tumors are cancerous, and the cancerous appendix tumors vary in degrees of aggressiveness.