What Is A Hyperplastic Polyp In The Colon? Key Facts

A hyperplastic polyp is a common type of growth found in the colon lining during a colonoscopy. These polyps are almost always benign, meaning they are not cancerous and have a very low risk of turning into cancer over time. Unlike adenomatous polyps, which are the main precursor to colorectal cancer, hyperplastic polyps are considered harmless in most cases.

If you or someone you know has been told about a hyperplastic polyp after a colonoscopy, the first thing to understand is that this is generally good news. Doctors typically consider these polyps as low-risk findings. However, not all hyperplastic polyps are exactly the same, and location matters. This article breaks down what the research actually says, what you need to watch for, and what you can ignore.

What Exactly Is a Hyperplastic Polyp?

A hyperplastic polyp is an overgrowth of normal colon cells. The word “hyperplastic” simply means too many cells are being produced, but those cells look normal under a microscope. They are not dysplastic, which is the term for abnormal, precancerous cells.

These polyps are usually small, often less than 5 millimeters in size. They tend to be smooth, round, and the same color as the surrounding colon tissue. Most are found in the rectum and the lower part of the colon, called the sigmoid colon.

Research published in Gastroenterology has shown that hyperplastic polyps account for roughly 10 to 30 percent of all polyps found during colonoscopies. The vast majority of these carry no malignant potential whatsoever. The only exception involves a rare subtype called sessile serrated polyps, which look similar but behave differently. Your pathology report should clearly distinguish between these two types.

How Are Hyperplastic Polyps Different from Other Polyps?

Not all colon polyps are created equal. The key difference lies in their cancer risk. Adenomatous polyps, or adenomas, are the ones doctors worry about because they can become cancerous over 5 to 10 years. Hyperplastic polyps, by contrast, almost never turn into cancer.

The only real confusion happens with sessile serrated polyps. These used to be classified as hyperplastic polyps but are now recognized as a distinct type with genuine cancer risk. If your pathology report says “sessile serrated polyp” or “sessile serrated adenoma,” that is a different conversation. A true hyperplastic polyp is not in that category.

Doctors typically remove all polyps during a colonoscopy regardless of type. This is standard practice because the appearance alone cannot always distinguish between subtypes. The final diagnosis always comes from the pathology lab.

What Causes Hyperplastic Polyps to Form?

The exact cause is not fully understood, and anyone who claims otherwise is oversimplifying. What researchers do know is that hyperplastic polyps develop from an imbalance in cell turnover in the colon lining. Cells die and regenerate constantly. Sometimes the regeneration process gets slightly overactive, and a small bump forms.

Some studies suggest a link to inflammation in the colon lining. Chronic irritation from stool passing through or from dietary factors may contribute. However, the evidence for this is moderate at best. The American Cancer Society notes that hyperplastic polyps are more common in people over age 50, which aligns with general aging of the colon tissue.

Genetics likely play a role too. People with a family history of hyperplastic polyposis syndrome, a rare condition, can develop dozens or even hundreds of these polyps. But for the average person, a single hyperplastic polyp is not a sign of a genetic disorder. It is simply a common finding that becomes more likely with age.

There is no strong evidence that diet directly causes or prevents hyperplastic polyps specifically. While a high-fiber diet is linked to lower overall colon cancer risk, the connection to these particular growths is weak. Do not let anyone convince you that a specific food or supplement caused your polyp.

Do Hyperplastic Polyps Need to Be Removed?

In almost all cases, yes, they are removed during the colonoscopy itself. The doctor sees a polyp and snips it off. This is done for two reasons. First, the doctor cannot be 100 percent sure what type it is just by looking at it. Second, removing it means it cannot grow larger or cause any future confusion.

Once the pathology report confirms it is a hyperplastic polyp, no further action is needed for that specific polyp. You do not need a repeat colonoscopy sooner because of it. The timing of your next colonoscopy depends on other factors, such as whether adenomatous polyps were found, your age, and your family history.

The CDC recommends that people at average risk start colon cancer screening at age 45. If your only finding was one or two small hyperplastic polyps in the rectum or sigmoid colon, your doctor will likely tell you to follow the standard screening interval of 10 years. If you had multiple or large hyperplastic polyps, or if they were in the right colon, your doctor may suggest a shorter interval, but this is uncommon.

One clarification worth making here: some older medical literature suggested that hyperplastic polyps in the right colon might be a marker for increased cancer risk. More recent research, including a large study in Gut, has not confirmed this. The current consensus is that right-sided hyperplastic polyps are not a red flag unless they are large or numerous.

What Follow-Up Care Is Actually Needed?

If you had only hyperplastic polyps, your follow-up care is straightforward. You do not need any special tests, medications, or supplements. You simply continue with routine colon cancer screening as recommended for your age and risk profile.

• Stick to the standard screening schedule your doctor sets, typically every 10 years if no other polyps were found.
• Do not request more frequent colonoscopies just because you had a hyperplastic polyp. This adds unnecessary cost and risk.
• If you have symptoms like rectal bleeding or a change in bowel habits, report those to your doctor regardless of your polyp history.
• Maintain a healthy lifestyle for overall colon health, though this is not specifically tied to hyperplastic polyps.

Some people report feeling anxious after any polyp finding. That is understandable. But the evidence is clear: a single small hyperplastic polyp in the rectum or sigmoid colon has no meaningful impact on your cancer risk. Your risk remains the same as someone who had no polyps at all.

The only scenario where follow-up changes is if you have hyperplastic polyposis syndrome, which is defined by having multiple hyperplastic polyps, usually more than 20, spread throughout the colon. This is rare and requires more frequent surveillance. Your gastroenterologist would recognize this pattern and discuss it with you. It is not something to worry about based on a single finding.

Common Misconceptions About Hyperplastic Polyps

A widespread myth is that all polyps are precancerous. This is simply not true. Hyperplastic polyps are the most common type of non-cancerous polyp. Telling someone that all polyps lead to cancer creates unnecessary fear.

Another misconception is that having a hyperplastic polyp means you did something wrong with your diet or lifestyle. There is no evidence to support this. These polyps appear in people with all kinds of eating habits and activity levels. Blaming yourself is not helpful and is not backed by science.

Some people also believe that removing a hyperplastic polyp is unnecessary and that doctors do it just to make money. While it is true that removal is not strictly required for your health, it is standard practice because the doctor cannot identify the polyp type with 100 percent accuracy during the procedure. Removing it is the safest approach and prevents any future confusion. This is not a profit-driven decision.

As of 2026, there is no clinical evidence that any supplement or alternative treatment can prevent or reverse hyperplastic polyps. Be cautious of anyone selling you a product or protocol claiming to do so. The best approach is routine screening and following your doctor’s recommendations for colonoscopy intervals.

What to Do If You Have Symptoms

Hyperplastic polyps themselves rarely cause symptoms. They are almost always found incidentally during a screening colonoscopy. If you are experiencing rectal bleeding, abdominal pain, or changes in bowel habits, those symptoms are not likely caused by a small hyperplastic polyp.

Do not assume that a polyp is the source of your symptoms. Your doctor should investigate other possible causes if you have ongoing gastrointestinal issues. Relying on a polyp finding as an explanation can delay diagnosis of something else that actually needs treatment.

If you have not had a colonoscopy and are experiencing symptoms, talk to your doctor about getting one. The procedure is the gold standard for finding and removing polyps of all types. It also allows for biopsy of any suspicious areas. The American College of Gastroenterology recommends colonoscopy every 10 years for average-risk adults starting at age 45.

For people with a family history of colorectal cancer or polyps, screening may need to start earlier. Your doctor can help determine the right age for you based on your family history and personal risk factors.