A Colorectal Adenocarcinoma With Obstruction in a 26-Year-Old Man: A Case Report in an Unlikely Age Group

Colorectal cancer affects the rectum or large bowel, including the appendix. This type of cancer develops from the colorectal mucosa, with adenocarcinoma being the most common form, accounting for over 95% of cases. It typically affects individuals aged 50 years or older. However, this report highlights a case of colorectal adenocarcinoma that occurred at a young age, despite no family history. Unfortunately, the cancer was initially missed during check-ups because of the unlikely age group, resulting in a delayed diagnosis. The patient, who presented with an obstruction, underwent surgical interventions. Upon further examination, the histopathological tests revealed that the patient had well-differentiated type I colorectal adenocarcinoma.