Colonoscopy Specialist in Singapore

Colonoscopy uses a flexible instrument inserted through the rectum to examine the entire large intestine (colon) and the end of the small intestine (terminal ileum). It is the established diagnostic tool for colorectal cancer screening and allows for the detection and removal of precancerous polyps, potentially preventing cancer from developing.

The procedure is performed under sedation for comfort and typically takes 20-45 minutes. High-definition cameras provide clear visualization of the bowel lining, allowing detection of even small abnormalities.

Colonoscopy is commonly recommended as a screening test for colorectal cancer in adults aged 45 and above, even in the absence of symptoms. The aim is to detect and remove precancerous polyps early, before they progress to cancer.

Some individuals may require earlier or more frequent screening because of higher underlying risk factors, including:

The timing and frequency of screening depend on the individual’s risk profile, previous colonoscopy findings, and overall health.

While screening colonoscopy is often performed before symptoms develop, certain symptoms should prompt earlier medical evaluation regardless of age. These include:

Although these symptoms do not always indicate serious disease, they should be assessed appropriately to exclude colorectal cancer, significant polyps, inflammation, or other gastrointestinal conditions.

Colonoscopy is generally considered a safe and commonly performed procedure. Most patients tolerate it well and recover quickly after the examination. Mild bloating, cramping, or temporary discomfort from the air introduced during the procedure can occur but usually settles within a few hours.

Sedation-related side effects such as drowsiness, nausea, or light-headedness may occasionally occur and are typically short-lived. Patients are usually advised not to drive or operate machinery for the remainder of the day after sedation.

Although uncommon, more significant complications can occur, including:

We will discuss the potential risks and benefits of the procedure before the examination.

If polyps are identified during colonoscopy, they can often be removed during the same procedure using specialised instruments passed through the scope. Removing polyps helps reduce the future risk of colorectal cancer.

The removed tissue is usually sent for laboratory analysis to determine the type of polyp and whether any precancerous changes are present. Follow-up recommendations depend on the number, size, and histology of the polyps removed. Some patients may only require routine surveillance, while others may need closer follow-up colonoscopy at shorter intervals.