Bowel cancer is usually associated with older adults, but it can also affect children, teenagers and young adults. Recognising the disease in younger patients is particularly challenging because its symptoms often resemble common digestive problems.

New research presented at the American Academy of Pediatrics' 2026 National Conference & Exhibition in San Diego highlights the difficulties surrounding early diagnosis and treatment.

The findings suggest that greater awareness of persistent symptoms could help younger patients receive appropriate medical attention sooner.

What Researchers Discovered

Scientists examined medical records from 84 patients aged 21 or younger who were diagnosed with intestinal cancer between 2012 and 2023. Most patients had already developed stage III or IV disease when their cancer was identified.

At these advanced stages, cancer may have spread to nearby lymph nodes or other parts of the body, making treatment more difficult. More than one-third of the patients experienced a recurrence, while nearly half died from the disease during the study's follow-up period. However, these findings reflect a relatively small group of patients and cannot be applied to all young people diagnosed with intestinal cancer.

Early Symptoms Can Be Misleading

One reason diagnosis can be difficult is that bowel cancer remains uncommon among younger age groups. Its symptoms may initially resemble digestive disorders or other less serious conditions.

Warning signs can include:

Persistent abdominal pain

Unexplained weight loss

Changes in bowel habits

Ongoing constipation or diarrhoea

Persistent lower back discomfort

Most people experiencing these symptoms will not have bowel cancer. Nevertheless, persistent or unexplained changes should be assessed by a healthcare professional.

Family History Is Not Always A Clue

Having relatives with intestinal cancer can increase a person's risk, particularly when inherited genetic conditions are involved. However, researchers found that only 20% of the patients studied had a first- or second-degree relative with a history of the disease. This suggests that family history alone cannot reliably identify every young patient who may develop intestinal cancer. Doctors therefore need to consider concerning symptoms even when there is no known inherited risk. The research did not establish why these cancers developed or identify specific causes.

Why Early Diagnosis Is Important

Intestinal cancer is generally more difficult to treat once it has spread beyond its original location. Delayed recognition may contribute to advanced diagnoses, although tumour biology and other factors can also influence outcomes. Researchers emphasised the importance of cooperation between paediatric specialists and adults cancer teams. Younger patients may require additional support because of their developmental, emotional and medical needs.

What Families Should Remember

The findings underline the importance of taking persistent digestive problems seriously, regardless of age. Unexplained bleeding, recurring abdominal discomfort and significant changes in bowel habits deserve appropriate medical investigation. The study's limited sample size means further research is necessary to understand intestinal cancer in younger populations.

Nevertheless, recognising unusual symptoms and seeking timely medical advice may help avoid unnecessary diagnostic delays. Age should never be the only factor determining whether a potentially serious condition deserves investigation.