John B. Johnson has all the time thought of himself match. He ran observe in highschool and performed rugby at Kent State College. At 35, eager to get in one of the best form of his life, he skilled for the 2023 Cleveland Marathon, racking up 70-plus miles per week. One morning, he seen blood in his stool. “At first, I assumed it was from consuming beets, but it surely endured,” he says. “I felt advantageous however knew I ought to get it checked out.”
Johnson ran the race in 3:04, which certified him for the Boston Marathon, then noticed his physician. “He initially thought the blood was brought on by a ruptured hemorrhoid, however nonetheless ordered a colonoscopy,” says Johnson. The process discovered a mass in his rectum that proved to be stage 2 colorectal most cancers.
Johnson was shocked. He was younger, ate clear (he hadn’t drunk a soda since his teenagers), and had no recognized most cancers in his household. “I simply received into Boston, and so they instructed me I used to be sick,” says Johnson. “It didn’t make sense.”
A rising drawback Colorectal most cancers typically strikes older adults, with 66 being the median age at analysis. Nonetheless, Johnson is a part of an alarming development of individuals underneath 50 getting colorectal most cancers, lots of whom are in any other case wholesome.
Colorectal most cancers circumstances elevated 3% per 12 months from 2013 to 2022 amongst adults youthful than age 50, with charges increased in males than in ladies. A examine within the Feb. 17, 2026 problem of JAMA discovered that colorectal most cancers deaths on this age group rose 1.1% per 12 months from 2005 to 2023. Colorectal most cancers is now the No. 1 deadly most cancers amongst these underneath 50.
Colorectal most cancers originates within the colon or the rectum, which along with the anus make up the massive gut. (Colorectal most cancers could also be known as colon most cancers or rectal most cancers, relying on the place it started.) Early indicators of colorectal most cancers are typically dismissed, corresponding to adjustments in bowel habits (unexplained diarrhea or constipation), rectal bleeding, and blood in your stool (shiny crimson or darkish and tarry). Different warnings embody sudden weight reduction, unexplained weak point and fatigue, cramping ache within the decrease stomach, and a sense that your bowel isn’t empty after passing stools.
All within the genes
Extra weight and weight problems, smoking, heavy alcohol use, and a weight loss program excessive in crimson and processed meat and low in fiber are the principle life-style elements linked with colorectal most cancers. Diabetes and inflammatory bowel illness (ulcerative colitis and Crohn’s illness) additionally elevate the danger.
Nonetheless, researchers are discovering that extra individuals who do all of the wholesome issues are nonetheless being identified. The explanations stay unclear.
One clarification could also be genetics. Individuals with a first-degree relative (mother and father or siblings) with colorectal most cancers have double the danger of getting the illness than these with no household historical past, in accordance with Dr. Vikram Reddy, MD, PhD, chief of colon and rectal surgical procedure at Yale College of Drugs. The danger is larger if that relative was identified earlier than age 50. Analysis has additionally discovered that the most cancers menace, though considerably decrease, could prolong to second-degree family members (aunts, uncles, nieces, nephews, and grandparents).
But, household connection is related to about 25% of circumstances. Inherited genetic issues make up roughly 10%. The remainder appears to happen by probability.
“Genetics could also be tied to this development of youthful individuals being identified, even those that are wholesome,” says Dr. Reddy. “We’ve recognized many genes linked with colorectal most cancers, however we haven’t recognized all of the genes accountable. Or it may show to be one thing else solely.”
If individuals have a household historical past of colorectal most cancers, genetic testing is an efficient screening device. In the event that they carry a recognized genetic marker, they’ll start early screening and monitoring.
Whether or not or not you understand your genetic danger, testing generally is a lifesaver. Simply ask Tim Hill, 36, a reduction pitcher for the New York Yankees.
In 2015, he arrived at spring coaching with the Kansas Metropolis Royals as an lively 25-year-old. He rapidly discovered that the day by day exercises left him exhausted. A blood take a look at revealed he was anemic with hemoglobin ranges at half the conventional quantity. Anemia generally is a signal of tumor bleeding from colorectal most cancers. That’s when Hill instructed his medical doctors that his father died from the illness at age 53.
Hill was identified with stage 3 most cancers, however he additionally found he had Lynch Syndrome, an inherited genetic situation affecting about one in 280 individuals, and the commonest reason for hereditary colorectal most cancers.
Surgical procedure eliminated half of Hill’s transverse colon, the longest a part of the massive gut, and your complete ascending colon. A number of rounds of radiation and eight months of chemotherapy left him cancer-free, however shrunk his physique from 210 to 145 kilos. The therapeutic course of was gradual, however when the following spring coaching rolled round, he was again to his sturdy former self.
Hill’s story underscores the necessity to scrutinize one’s household well being information and take motion when wanted. “My father more than likely received most cancers due to Lynch, however he by no means knew he had it, so I by no means thought I used to be in peril though my dad was in his early 50s when he died,” he says. “Who thinks about checking for most cancers danger after they’re 25?”
Getting screened
One of the best protection towards colorectal most cancers, at any age, is an efficient offense. It begins with sticking to wholesome habits. “If you happen to’re exercising, consuming unprocessed meals, switching out crimson meat and pork for rooster and fish, and getting sufficient fiber, you’re already doing all the best issues to guard your self,” says Dr. Reddy. “However you additionally want to remain vigilant and see your physician when you expertise any new stomach signs that linger for greater than every week.”
Routine screening is a should. A colonoscopy stays the gold commonplace, and pointers advocate having one by age 45. If a first-degree relative had colorectal most cancers, start at 40, or 10 years earlier than the age at which the relative developed most cancers, whichever is earlier. (For instance, in the event that they have been identified at age 45, get screened at 35.)
Throughout a colonoscopy, a versatile tube with a light-weight and a digital camera on the tip is inserted via the rectum to look at the rectum, colon, and the final a part of the small gut for polyps—small growths that may grow to be colorectal most cancers. Any discovered polyps are eliminated.
“Relying in your outcomes and your danger, it’s possible you’ll want repeat colonoscopies each 10, 5, and even two to 3 years,” says Dr. Reddy. “Sufferers with genetic syndromes might have annual screening.”
Additionally, inquire about genetic testing if colorectal most cancers runs within the household, or when you’re inquisitive about your danger. The easy blood take a look at is cheap and lined by many insurance policy when prescribed by your physician.
Again within the race
For Johnson, colorectal most cancers was an agonizing, however reworking, a part of his life. After 25 doses of radiation (“The worst ache I’ve ever felt”) and eight chemotherapy therapies over 4 months (“The sickest I’ve ever felt”), the tumor vanished.
In 2025, he ran Boston, matching his time from the Cleveland Marathon. A month later, he ran Cleveland once more, two years after his analysis, and broke the three-hour mark. His journey impressed him to launch the Get Off My Butt Basis to assist break the silence round colorectal most cancers amongst younger adults and the health group.
Johnson’s warning: By no means assume you’re invincible. “Admitting one thing is off along with your physique, and getting checked, isn’t an indication of weak point, however a mark of energy,” he says. “I used to be in one of the best form of my life, and I nonetheless received most cancers. It could possibly occur to anybody.”
