Colon cancer misdiagnosis in younger adults is a concern, study suggests - CNN

While most colon and rectal cancer patients older than 50 are diagnosed in the early stages of disease, younger patients tend to be diagnosed at advanced stages, research suggests. Does this mean colorectal cancer initially is misdiagnosed in younger patients? ....
https://www.cnn.com/2019/03/30/health/colon-rectal-cancer-misdiagnosed-young-adults-study/index.html