Colorectal cancer risks highlighted by cases of asymptomatic or misdiagnosed symptoms

Recent medical cases underscore the difficulty of detecting colorectal cancer when symptoms are subtle or mistaken for common ailments like hemorrhoids.

In one instance, a 40-year-old woman in Japan experienced chronic constipation and diarrhea, which she initially attributed to routine issues. After seeking treatment for what she believed were hemorrhoids, a colonoscopy revealed a large tumor in the sigmoid colon. She was diagnosed with Stage IIIb colorectal cancer and underwent laparoscopic surgery followed by XELOX chemotherapy.

In another case, a 59-year-old office worker in Taiwan reported only a vague sensation of discomfort or fullness in the rectal area, without pain or bleeding. A medical examination revealed a large, slightly depressed polyp that was later identified through pathology as Stage I rectal adenocarcinoma. Doctors noted that while the polyp was removed, there remained a 10% chance of lymph node metastasis.

Medical professionals emphasize that early-stage colorectal cancer often presents with no obvious warning signs. Experts advise individuals over the age of 40 to undergo regular screenings, especially if they experience persistent rectal discomfort or changes in bowel habits, rather than assuming symptoms are caused by hemorrhoids.