More than a dozen kinds of cancer are on the rise in adults under 50 across the United States, according to Kffhealthnews. Among these early-onset cases, colorectal and breast cancers have increased the most. Colorectal cancer has become the deadliest cancer for Americans between the ages of 18 and 49.
Early-Onset Cancers Rise in Under-50s
Research has not identified a single cause for the surge in early-onset cases. Instead, studies point to a myriad of factors, including obesity, heavy alcohol use, environmental factors such as microplastics, and disruptions to gut health. According to Stanford, genes do not evolve quickly enough to explain how rates have leapt in just a few decades, leading researchers to suspect environmental exposures originating around the middle of the 20th century. While an increase in obesity and processed food consumption contributes to the rise, experts note those factors do not account for the full change observed.
Recognizing Symptoms and Diagnostic Delays
Patients and physicians often attribute early symptoms of colorectal cancer to other common conditions. For example, stomach cramps may be written off as a result of diet, food intolerances, irritable bowel syndrome, or anxiety. Bryce Ramsey of Madison, Mississippi, was 33 when she noticed blood in her stool and initially blamed hemorrhoids developed after delivering her son eight years earlier.
Oncologist Veda Giri, director of the Early Onset Cancer Program at Yale Cancer Center, emphasized the importance of reporting unusual body changes to a physician. Warning signs include a lump in the breast, abdominal pain, changes in bowel habits that do not go away, blood in the stool, and unusual fatigue.
A Stanford Medicine study concluded that younger patients take 40% longer to be diagnosed with colorectal cancer than older patients. By the time they receive a diagnosis, nearly three in four patients under 50 have advanced disease, sometimes discovering the tumor only after it grows large enough to cause an intestinal obstruction.
The Role of Family History and Screening Guidelines
Family history serves as one of the most important risk factors for early-onset cancers. Doctors generally follow population-level guidelines for routine screenings—such as recommending mammograms starting at age 40—but physicians might recommend screenings as early as a patient’s 20s after weighing personal risks like family history.
Ramsey learned only after her diagnosis that her grandfather previously had colorectal cancer. Following her own treatment, she encouraged her father, aunt, and brother to get screened, and all three were diagnosed with colon cancer and survived. National advocacy and medical groups differ on whether regular screenings should occur every year or every other year.
Personalized Risk Assessment and Prevention
Traditional screening guidelines can arrive too late for patients who develop symptoms in their 20s or early 30s. A new study published in Businessinsider suggests that a more nuanced, individualized approach could help calculate unique cancer risks and improve early detection.
Lead study author Neel Butala, a professor at the University of Colorado School of Medicine and cofounder of the startup Catch, noted that age acts as a crude proxy for cancer risk. The study examined 100 risk factors ranging from supplement use to drinking habits. While the research included people from ages 40 to 70, it aims to help doctors initiate conversations about personal risk and lifestyle changes, such as eating at least two servings of fruit or vegetables daily, eating more fatty fish, exercising for about 30 minutes a day, cutting back on processed foods, added sugar, and salt, drinking coffee or tea daily, and staying hydrated.
