Appendix cancer rates quadruple among millennials, raising alarms for younger generations

A new study published in the Annals of Internal Medicine has revealed a sharp and troubling rise in appendix cancer rates among younger generations, particularly millennials and Generation X. Researchers at Vanderbilt University Medical Center analyzed data from the National Cancer Institute’s Surveillance, Epidemiology and End Results (SEER) program, tracking cases from 1975 to 2019. Their findings show that the incidence of appendix cancer has tripled among those born in 1980 and quadrupled for individuals born in 1985, compared to people born in 1945.

Although appendix cancer remains rare—about 3,000 new cases are diagnosed annually in the United States, a fraction of the more than 150,000 cases of colorectal cancer—the generational trend is significant. The study’s lead author, Dr. Andreana Holowatyji, emphasized that the rise is not due to increased appendectomies, as surgical rates have remained stable over time.Instead, the increase points to broader shifts in environmental and lifestyle risk factors.

Experts suggest that the surge in appendix cancer rates mirrors patterns seen in other gastrointestinal cancers, such as colorectal and stomach cancers, which are also rising among people under 50. Potential contributors include higher rates of obesity, metabolic syndrome, and increased consumption of ultraprocessed foods, especially processed meats and sugary beverages. However, the precise causes remain unclear, and researchers stress the need for further investigation into environmental exposures and molecular changes that may drive carcinogenesis.


Symptoms of appendix cancer can be vague—such as bloating, changes in bowel habits, and loss of appetite—making early diagnosis challenging. The study underscores the importance of greater awareness among both healthcare professionals and the public, as early detection remains critical for better outcomes.

With appendix cancer incidence rising sharply in younger adults, the findings highlight an urgent need for continued research and public health vigilance to address this emerging cancer trend.