text: <unk>  of appendix cancer should be discussed with respect to the major histological characteristics of the tumors. Prevalence, risk factors, age distribution as well as prognosis are different in the two major types of appendiceal cancers, adenocarcinoma and carcinoid tumors. The incidence of carcinoid tumor of appendix is approximately  0.075 per 100,000 individuals worldwide. The incidence of adenocarcinoma of the appendix is approximately  0.2 per 100,000 individuals worldwide. Appendiceal neoplasms account for approximately 0.4% of gastrointestinal tumors. The estimated prevalence of appendix cancer is approximately 0.12 cases per 100,000 individuals in the United States.The incidence of appendix cancer increases with age; meanwhile, patients with carcinoid tumors are generally younger than their adenocarcinoma counterparts. The median age at diagnosis is 65 years for adenocarcinoma, compared to 32-43 years (range, 6 to 80 years) for carcinoid tumors. There is no racial predilection to appendiceal cancers. Meanwhile, carcinoid tumors are slightly more prevalent among Caucasians and African-Americans. Generally appendiceal cancers affects men and women equally. While in adenocarcinoma, there is a male dominant pattern of prevalence, females are more commonly affected by appendiceal carcinoids than men.
option_0: Appendix cancer epidemiology and demographics
option_1: Oral cancer classification
option_2: Skin cancer classification
option_3: Appendix cancer secondary prevention
option_4: Breast cancer classification
option_5: Appendix cancer risk factors
option_6: Vulvar cancer classification
option_7: Cervical cancer classification