An endoscopy is a procedure that lets a doctor look directly inside part of your body using a thin, flexible tube with a camera on the end. When people ask what is found during this exam, the answer is usually one of a few categories: harmless anatomy, inflammation, ulcers, growths, or signs of acid reflux. The most common findings are often benign, but some require a biopsy or follow-up care.
What Are The Most Common Things Found In Endoscopy?
The most common findings depend on which part of the body is being examined. An upper endoscopy looks at the esophagus, stomach, and the first part of the small intestine. A colonoscopy looks at the large intestine. In both cases, the most frequent findings are inflammation, polyps, ulcers, and signs of chronic acid exposure.
In an upper endoscopy, the most common findings include gastritis, esophagitis, and peptic ulcers. In a colonoscopy, the most common findings are polyps, diverticulosis, and hemorrhoids. Many of these are discovered in people who had no symptoms at all.
Why Do Doctors Perform Endoscopy?
Doctors order endoscopy to investigate symptoms like persistent heartburn, trouble swallowing, abdominal pain, bleeding, or unexplained weight loss. The procedure allows direct visualization of tissue that X-rays and CT scans cannot show in detail. It also allows the doctor to take small tissue samples, called biopsies, during the same session.
Endoscopy is considered the gold standard for diagnosing many digestive conditions. It is more accurate than imaging alone because the doctor sees the actual lining of the organ in real time.
Gastritis and Inflammation
Gastritis is inflammation of the stomach lining. It is one of the most common findings in an upper endoscopy. The lining may look red, swollen, or eroded. In many cases, it is caused by an infection with H. pylori bacteria, long-term use of nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen, or heavy alcohol use.
Inflammation in the esophagus is called esophagitis. It often results from stomach acid flowing backward into the esophagus, a condition known as gastroesophageal reflux disease (GERD). The tissue may look red, raw, or have white patches. Chronic inflammation can lead to changes in the esophageal lining over time, which is why doctors take biopsies when they see suspicious areas.
Ulcers
A peptic ulcer is a sore in the lining of the stomach or the duodenum, which is the first part of the small intestine. Ulcers appear as distinct craters or depressions in the tissue. They can range from shallow erosions to deep sores that bleed.
The two main causes of ulcers are H. pylori infection and NSAID use. When a doctor finds an ulcer during endoscopy, they will usually test for H. pylori and take a biopsy to rule out malignancy. Most ulcers heal with treatment, but they can cause serious bleeding if left untreated.
Polyps and Growths
Polyps are abnormal tissue growths that protrude from the lining of an organ. They are the most common finding in colonoscopy. Most polyps are benign, but some types can develop into cancer over many years. This is why doctors remove polyps during the procedure whenever possible.
In the stomach, polyps are less common but still found regularly. Most stomach polyps are harmless, but certain types carry a small risk of becoming cancerous. The doctor will remove or biopsy any polyp that looks suspicious. Removal during endoscopy is often the complete treatment.
Signs of Acid Reflux
GERD is extremely common, and its effects show up clearly on endoscopy. The lower esophagus may show red streaks, erosions, or ulcers caused by stomach acid. In more advanced cases, the normal pink lining of the esophagus is replaced by a salmon-colored tissue called Barrett’s esophagus.
Barrett’s esophagus is a change in the cells lining the lower esophagus. It is associated with chronic acid reflux and carries a small increased risk of esophageal cancer. Not everyone with GERD develops Barrett’s esophagus, but when it is found, doctors recommend regular surveillance endoscopies to monitor for changes.
Diverticulosis and Other Colon Findings
Diverticulosis is a condition where small pouches form in the wall of the colon. It is extremely common, especially in people over 50. Most people with diverticulosis have no symptoms. The pouches are found incidentally during a routine colonoscopy and usually require no treatment.
Hemorrhoids are also commonly noted during colonoscopy. These are swollen veins in the lower rectum and anus. They are not dangerous but can cause itching, pain, or bleeding. Other common colon findings include benign lymphoid follicles, which are small clusters of immune tissue, and melanosis coli, a harmless darkening of the colon lining often linked to long-term laxative use.
What Does a Normal Result Look Like?
A normal endoscopy shows smooth, pink tissue with no ulcers, growths, or bleeding. The esophagus, stomach, and duodenum should have a uniform appearance. In the colon, the lining should be smooth with normal blood vessels visible beneath the surface.
A completely normal result is common, especially when the procedure is done for screening rather than for specific symptoms. However, a normal endoscopy does not rule out all digestive problems. Conditions like irritable bowel syndrome, functional dyspepsia, and some motility disorders do not show visible changes on endoscopy.
When Findings Require a Biopsy
Biopsies are taken when the doctor sees something unusual. This includes suspicious polyps, ulcers, inflamed tissue, or areas that look different from the surrounding lining. Biopsies are also routinely taken in certain situations even when tissue looks normal, such as in the stomach to check for H. pylori infection.
The biopsy results take a few days to come back. Many findings are benign, but the biopsy is the only way to know for certain. In the case of celiac disease, for example, the intestinal lining may look flat or damaged, but the diagnosis requires biopsy confirmation.
How Serious Are These Findings?
Most findings from endoscopy are not emergencies. Gastritis, mild esophagitis, and small polyps are common and treatable. Even ulcers usually respond well to medication and lifestyle changes. The main concerns are bleeding, advanced malignancy, and precancerous changes like high-grade dysplasia.
Your doctor will explain what was found and what it means for your health. Some findings require a repeat endoscopy in a few years. Others need no follow-up at all. The value of endoscopy is that it gives you answers instead of guessing.
Frequently Asked Questions
Is it normal to find something during an endoscopy?
Yes, most people have at least one minor finding, such as mild inflammation or a small polyp. The majority of these findings are benign and require no treatment.
Can an endoscopy detect cancer?
Yes, endoscopy can detect cancerous growths and precancerous changes in the digestive tract. Biopsies confirm whether abnormal tissue is malignant.
How long does it take to get biopsy results from an endoscopy?
Biopsy results typically take three to seven days. Your doctor will contact you with the results and explain what they mean.
What happens if they find a polyp during endoscopy?
The doctor usually removes the polyp during the same procedure. It is then sent to a lab to determine whether it is benign or precancerous.
