Experts Explain Why Right-sided colon cancer Often Goes Unnoticed, List Key Warning Signs
News Mania Desk /Piyal Chatterjee/ 24th March 2026

Health experts have raised concerns about the silent nature of Right-sided colon cancer, warning that the condition frequently remains undetected until it reaches an advanced stage. Unlike cancers that develop on the left side of the colon, this form tends to produce subtle and easily overlooked symptoms, making early diagnosis more challenging.
According to oncologists, the difference lies in the anatomy of the colon. The right side, also known as the ascending colon, has a wider diameter, allowing tumours to grow without immediately blocking the passage. This means patients may not experience the typical warning signs associated with Colon cancer, such as noticeable changes in bowel habits or visible bleeding, which are more common in left-sided cases.
Doctors explain that one of the earliest indicators of right-sided colon cancer is unexplained fatigue. This is often linked to slow, internal blood loss that can lead to anaemia over time. Patients may also experience sudden weight loss, persistent weakness, or a general sense of low energy, symptoms that are frequently dismissed or attributed to less serious conditions.
In contrast, Left-sided colon cancer tends to present clearer symptoms, including constipation, narrowing of stools, and abdominal discomfort. Bloating and noticeable changes in bowel movements are also more commonly reported, making it easier for individuals to seek medical attention at an earlier stage.
Despite its subtlety, right-sided colon cancer does present warning signs that should not be ignored. Experts highlight five key symptoms to watch for: ongoing fatigue, unexplained weight loss, anaemia, persistent abdominal discomfort, and general weakness. Recognising these early signals can play a crucial role in timely diagnosis and treatment.
Medical professionals strongly recommend regular screening, particularly for individuals over the age of 45 or those with a family history of the disease. Procedures like colonoscopy remain essential tools for detecting abnormalities before symptoms become severe.
With colon cancer cases on the rise globally, doctors stress the importance of awareness and vigilance. Paying attention to even minor, persistent symptoms and seeking timely medical advice can significantly improve outcomes and help detect this often “silent” disease at an earlier, more treatable stage.



