It was barely sunrise Jan. 8 when I arrived for a medical appointment, unfurled The Post and zeroed in on the headline, “‘It could happen to anybody,’” about the rising rate of colon cancer in young people. I exclaimed to the receptionist, “Good thing I’m here for my colonoscopy: Look at today’s front-page article in The Post!” Barely half my age, she replied, “Oh! Maybe I should get checked!” On referencing the article when I was in the surgical suite a few minutes later, an assistant confirmed that women 55 and younger represented a growing proportion of their patients.