Colon Polyp Detection & Removal in Dallas, TX

Medically reviewed by Jaison John, MD — Board-Certified Gastroenterologist
Last updated: March 2026

What Are Colon Polyps?

Colon polyps are abnormal growths of tissue that develop on the inner lining of the colon (large intestine) or rectum. They range in size from a few millimeters — barely visible to the naked eye — to several centimeters in diameter. Polyps can be pedunculated (attached to the colon wall by a stalk, resembling a mushroom) or sessile (flat and growing directly on the surface of the colon). While the majority of colon polyps are benign, certain types have the potential to develop into colorectal cancer over time, making their detection and removal one of the most important goals of preventive gastroenterology.

Colon polyps are extremely common. Studies estimate that 25% to 40% of adults over the age of 50 will have at least one colon polyp detected on screening colonoscopy. Colorectal cancer — the third most common cancer and the second leading cause of cancer death in the United States — develops from precancerous polyps through a well-characterized sequence of genetic mutations known as the adenoma-carcinoma sequence, a process that typically takes 10 to 15 years. This long progression window is what makes colonoscopy such a powerful cancer prevention tool: by finding and removing polyps during their precancerous stage, colorectal cancer can be prevented entirely.

At Texas Gut Health in Sachse, TX, Dr. Jaison John provides expert colonoscopy services with meticulous polyp detection and removal for patients throughout the Dallas-Fort Worth area. Dr. John completed his gastroenterology fellowship at UT Medical Branch, where he served as Chief Fellow, and his internal medicine residency at UT Austin Dell Medical School, where he served as Chief Resident. He holds dual board certifications from the American Board of Internal Medicine in both internal medicine and gastroenterology, and he follows the latest screening and surveillance guidelines from the American Cancer Society (ACS), the U.S. Multi-Society Task Force on Colorectal Cancer, and the American College of Gastroenterology (ACG).

Types of Colon Polyps

Not all colon polyps are the same. The type of polyp determines its cancer risk and the surveillance schedule after removal. All polyps removed during colonoscopy are sent to a pathology laboratory for microscopic examination to determine their type, size, and histological features.

Adenomatous Polyps (Adenomas)

Adenomas are the most clinically significant type of colon polyp because they are precancerous — they have the potential to develop into colorectal cancer if left in place over time. Approximately two-thirds of all colon polyps removed at colonoscopy are adenomas. Adenomas are classified by their growth pattern:

• Tubular adenomas — The most common type of adenoma, accounting for about 80% of adenomatous polyps. Tubular adenomas have a tube-like (tubular) growth pattern and generally carry a lower cancer risk compared to other adenoma subtypes, particularly when small (less than 10 mm).
• Villous adenomas — Characterized by finger-like (villous) projections, villous adenomas carry a higher risk of harboring cancer or progressing to cancer, especially when large. They tend to be sessile (flat) rather than pedunculated.
• Tubulovillous adenomas — These polyps contain a mixture of both tubular and villous growth patterns and carry an intermediate cancer risk.

The cancer risk of an adenoma increases with its size (polyps larger than 10 mm have a significantly higher risk), the presence of villous features, and the presence of high-grade dysplasia (severely abnormal cells that are a step closer to cancer). Adenomas with any of these features are classified as "advanced adenomas" and require closer surveillance after removal.

Sessile Serrated Polyps (SSPs)

Sessile serrated polyps (formerly called sessile serrated adenomas) are a type of polyp that is now recognized as a significant precursor to colorectal cancer through the serrated neoplasia pathway — a molecular pathway distinct from the adenoma-carcinoma sequence. SSPs are typically flat, pale, and covered with a mucus cap, making them more difficult to detect during colonoscopy. They are found predominantly in the right (proximal) colon. SSPs with dysplasia carry a particularly high risk of cancer progression and require close surveillance.

Hyperplastic Polyps

Hyperplastic polyps are the most common non-neoplastic polyps and are composed of normal-appearing cells with an accelerated growth pattern. They are usually small (less than 5 mm), found in the rectum and sigmoid colon, and are generally considered to carry very low or negligible cancer risk. Small hyperplastic polyps in the distal colon do not typically alter surveillance recommendations. However, large hyperplastic polyps (10 mm or greater) or those located in the right colon warrant closer evaluation, as they may be difficult to distinguish from sessile serrated polyps.

Other Polyp Types

• Inflammatory polyps — Found in patients with inflammatory bowel disease (ulcerative colitis or Crohn's disease), these polyps form as a result of chronic inflammation and healing. They are generally benign but are found in a colon that has an overall elevated cancer risk due to the underlying inflammatory condition.
• Hamartomatous polyps — Uncommon polyps associated with genetic syndromes such as Peutz-Jeghers syndrome and juvenile polyposis. These polyps require specialized surveillance.

Symptoms of Colon Polyps

The vast majority of colon polyps cause no symptoms at all. This is precisely why routine screening colonoscopy is essential — polyps are most often discovered during a colonoscopy performed for screening purposes rather than in response to symptoms. When polyps do produce symptoms, they tend to be larger and may include:

• Rectal bleeding — Blood on the toilet paper, in the toilet bowl, or mixed with the stool can be a sign of a colon polyp, particularly a large one. Blood may appear bright red (if the polyp is in the lower colon or rectum) or dark/tarry (if the polyp is in the upper colon).
• Change in bowel habits — New constipation or diarrhea lasting more than a few days, or a noticeable change in the caliber (width) of the stool, may be associated with a large polyp that is partially obstructing the colon.
• Abdominal pain or cramping — Large polyps may occasionally cause abdominal discomfort, cramping, or a vague sense of fullness.
• Iron deficiency anemia — Chronic, low-level bleeding from a polyp that is not visible to the naked eye (occult blood loss) can cause iron deficiency anemia, leading to fatigue, weakness, and shortness of breath.
• Mucus in stool — Some polyps, particularly large villous adenomas, may secrete mucus that is visible in the stool.

Causes & Risk Factors

Colon polyps develop when the normal process of cell growth and turnover in the colonic lining becomes dysregulated. Under normal conditions, cells lining the colon divide in an orderly fashion, mature, and are eventually shed. When genetic mutations disrupt this process, cells can accumulate and form a polyp. Over time, additional mutations may cause the polyp to grow larger and eventually become cancerous — this is the adenoma-carcinoma sequence.

Non-Modifiable Risk Factors

• Age — The risk of developing colon polyps increases significantly after age 45 to 50. This is why the ACS and ACG recommend beginning screening colonoscopy at age 45 for average-risk individuals.
• Family history — Having a first-degree relative (parent, sibling, or child) with colorectal cancer or advanced adenomas increases your risk of developing polyps by two to four times. The risk is even higher if the relative was diagnosed before age 60 or if multiple relatives are affected.
• Personal history of polyps — Patients who have had adenomatous polyps in the past are at increased risk of developing new polyps and require surveillance colonoscopy at intervals determined by their prior polyp findings.
• Inherited genetic syndromes — Familial adenomatous polyposis (FAP), Lynch syndrome (hereditary nonpolyposis colorectal cancer, or HNPCC), and other inherited conditions dramatically increase the risk of polyps and colorectal cancer. Patients with these syndromes require specialized screening and management.
• Inflammatory bowel disease — Long-standing ulcerative colitis or Crohn's colitis increases the risk of colorectal cancer and requires enhanced surveillance colonoscopy.
• Race and ethnicity — African Americans have a higher incidence of colorectal cancer and may develop polyps at a younger age compared to other racial groups. Some guidelines recommend earlier screening for African Americans.

Modifiable Risk Factors

• Obesity — Being overweight or obese is associated with a higher risk of colon polyps and colorectal cancer. Central (abdominal) obesity appears to carry the greatest risk.
• Sedentary lifestyle — Physical inactivity is associated with increased polyp risk, while regular exercise has been shown to reduce the risk of colorectal neoplasia.
• Diet — A diet high in red and processed meats and low in fiber, fruits, and vegetables has been linked to increased polyp risk. A high-fiber, plant-rich diet appears to be protective.
• Smoking — Tobacco use increases the risk of colon polyps and colorectal cancer. The risk increases with the duration and intensity of smoking.
• Alcohol — Heavy alcohol consumption (three or more drinks per day) is associated with increased polyp and colorectal cancer risk.
• Type 2 diabetes — Insulin resistance and type 2 diabetes have been linked to an increased risk of colon polyps and colorectal cancer, independent of obesity.

How Colon Polyps Are Diagnosed

Because most colon polyps cause no symptoms, they are typically discovered during screening examinations. The choice of screening method depends on patient preference, risk level, and clinical considerations, but colonoscopy is the gold standard because it is the only test that allows both detection and removal of polyps in a single session.

Colonoscopy

Colonoscopy is the most comprehensive and effective method for detecting colon polyps. During a colonoscopy, Dr. John passes a long, flexible scope with a high-definition camera through the rectum and examines the entire length of the colon. The procedure is performed under sedation for patient comfort. If polyps are found, they are typically removed immediately during the same procedure (polypectomy), eliminating the need for a separate surgery. The removed tissue is sent to pathology for microscopic analysis to determine the polyp type, size, and grade of dysplasia. Colonoscopy is recommended every 10 years for average-risk adults beginning at age 45, or more frequently based on individual risk factors and prior polyp findings.

Stool-Based Screening Tests

• Fecal immunochemical test (FIT) — FIT detects microscopic amounts of human blood in the stool using antibodies specific to human hemoglobin. It is performed annually and does not require dietary restrictions. A positive FIT result requires follow-up colonoscopy to identify and remove the source of bleeding.
• Multi-target stool DNA test (Cologuard) — This test combines FIT with detection of DNA biomarkers shed by abnormal colonic cells. It is performed every 3 years. A positive result requires follow-up colonoscopy. While stool DNA testing has higher sensitivity for cancer and advanced adenomas than FIT alone, it also has a higher rate of false-positive results.

Important: Stool-based tests are screening tools only. A positive result on any stool test must be followed by a diagnostic colonoscopy. Stool tests cannot remove polyps — only colonoscopy can accomplish both detection and treatment in a single session.

Other Screening Methods

• CT colonography (virtual colonoscopy) — A CT scan that creates detailed images of the colon. CT colonography can detect polyps 6 mm or larger but cannot remove them. If significant polyps are found, a follow-up colonoscopy is needed for removal.
• Flexible sigmoidoscopy — A limited scope examination that evaluates only the lower third of the colon (sigmoid and rectum). Sigmoidoscopy can detect polyps in the distal colon but misses polyps in the right colon, where a significant proportion of cancers and serrated polyps are found.

Treatment Options

The treatment for colon polyps is removal (polypectomy), which is performed during colonoscopy. The specific technique depends on the polyp's size, shape, and location. At Texas Gut Health, Dr. John uses advanced endoscopic techniques to ensure complete and safe polyp removal.

Polypectomy Techniques

• Cold forceps biopsy — Very small polyps (1 to 3 mm) can be removed using biopsy forceps passed through the colonoscope. This is the simplest technique and is appropriate for diminutive polyps.
• Cold snare polypectomy — A thin wire loop (snare) is placed around the polyp and tightened to cut the polyp from the colon wall without using electrical current. Cold snare polypectomy is the recommended technique for polyps up to 10 mm and has an excellent safety profile with minimal bleeding risk.
• Hot snare polypectomy — For larger polyps, a snare is placed around the polyp and electrocautery (electrical current) is applied to simultaneously cut the polyp and cauterize the base to prevent bleeding. Hot snare polypectomy is typically used for pedunculated polyps and larger sessile polyps.
• Endoscopic mucosal resection (EMR) — EMR is an advanced technique for removing large, flat polyps (typically 20 mm or larger) that cannot be easily captured with a standard snare. A solution is injected beneath the polyp to lift it from the underlying muscle layer, and the elevated polyp is then removed with a snare, either in one piece (en bloc) or in multiple fragments (piecemeal). EMR allows removal of large polyps without surgery.

Surveillance After Polyp Removal

After polyps are removed, a surveillance colonoscopy schedule is established based on the number, size, type, and histological features of the polyps found. The U.S. Multi-Society Task Force on Colorectal Cancer provides evidence-based guidelines for surveillance intervals:

• 1–2 small (<10 mm) tubular adenomas: Repeat colonoscopy in 7 to 10 years.
• 3–4 small tubular adenomas: Repeat colonoscopy in 3 to 5 years.
• 5–10 adenomas: Repeat colonoscopy in 3 years.
• Adenoma ≥10 mm: Repeat colonoscopy in 3 years.
• Adenoma with villous features or high-grade dysplasia: Repeat colonoscopy in 3 years.
• More than 10 adenomas on a single exam: Repeat colonoscopy in 1 year, and consider genetic evaluation.
• Sessile serrated polyp <10 mm without dysplasia: Repeat colonoscopy in 5 to 10 years.
• Sessile serrated polyp ≥10 mm or with dysplasia: Repeat colonoscopy in 3 years.
• Piecemeal removal of large polyp: Repeat colonoscopy in 6 months to verify complete removal, then follow standard surveillance intervals.

Dr. John provides each patient with a clear, personalized surveillance plan based on the specific polyp findings from their colonoscopy. Adherence to recommended surveillance intervals is one of the most important things you can do to prevent colorectal cancer.

Prevention Strategies

While screening colonoscopy is the most effective way to prevent colorectal cancer (by detecting and removing precancerous polyps), lifestyle modifications can reduce the overall risk of polyp formation:

• Maintain a healthy weight and engage in regular physical activity (at least 150 minutes of moderate exercise per week).
• Eat a diet rich in fruits, vegetables, whole grains, and fiber.
• Limit red and processed meats.
• Avoid smoking and limit alcohol consumption.
• Discuss aspirin use with your physician — the U.S. Preventive Services Task Force has recommended low-dose aspirin for colorectal cancer prevention in certain patient populations, though this should be discussed with your doctor.
• Ensure adequate calcium and vitamin D intake, which some studies suggest may reduce polyp risk.

Frequently Asked Questions