Kimmie Ng, M.D., a Boston oncologist, started noticing an alarming trend in her work a few years ago. Men in their 20s, 30s, and 40srunners, CrossFitters, lifelong nonsmokerswere streaming through her door at the Dana-Farber Cancer Institute. They all appeared lively and strongyet there they were, battling colorectal cancers, a family of diseases that can start in the colon or rectum and are typically associated with older people and those with risk factors like family history and obesity.
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