In 84 patients age 21 or younger, colorectal cancer was usually already stage III or IV at diagnosis

What the research found

Study (chart review presented at a meeting; not a journal paper with a DOI in this release). ScienceDaily carried the American Academy of Pediatrics account on 6 October 2026. Erica Arnold and colleagues reviewed records of 84 patients age 21 or younger diagnosed with colorectal cancer from 2012 to 2023, presented at the AAP 2026 National Conference in San Diego, 2–6 October 2026. Only 20 percent had a first- or second-degree family history. Most already had stage III or IV disease. More than one third later had recurrent disease, and nearly half died of the cancer. The authors list lower back pain, abdominal pain, bowel changes, weight loss, and rectal bleeding as signs that can be missed because the disease is still uncommon at these ages. Sex is not split in the release. This is a description of a small clinical series, not a screening rule. Educational notes. This is not medical advice.

Evidence level: Human study. A study in people, but an association isn't proof of cause.

Read the original at American Academy of Pediatrics 2026 National Conference