Colonoscopy & Scoring
You just got your colonoscopy report back, and it reads like it was written in another language. Terms like "friable mucosa," "loss of vascular pattern," and "Mayo endoscopic score 2" fill the page, but nobody handed you a glossary. If you have ulcerative colitis (UC), your colonoscopy report contains specific findings that differ from other conditions, and understanding them can help you have more productive conversations with your gastroenterologist. Here is a plain-language walkthrough of what each section of your UC colonoscopy report actually means.
The Basic Layout of Your Report
Every colonoscopy report follows a general structure. The procedure summary covers why the exam was performed, how well your bowel prep worked, and whether the scope reached the cecum (the beginning of your colon). The findings section describes what your gastroenterologist saw during the exam, segment by segment. The pathology section summarizes biopsy results from tissue samples taken during the procedure. For UC patients, the findings section is where the most disease-specific information lives. Your doctor is looking at the pattern, extent, and severity of inflammation along your colon, and the report language reflects standardized observations that map to established scoring systems.
Continuous Inflammation and Disease Extent
One of the hallmarks of UC is that inflammation starts at the rectum and extends upward in a continuous, unbroken pattern. Your report will describe how far that inflammation reaches, and this determines your disease classification. If inflammation is confined to the rectum, your report may say "proctitis." If it extends through the sigmoid colon, it becomes "proctosigmoiditis." Inflammation reaching up to the splenic flexure (the bend near your spleen) is called "left-sided colitis," and when it extends beyond that point, the term is "extensive colitis" or "pancolitis." Pay attention to whether your report describes the inflammation as continuous or patchy. Continuous inflammation starting from the rectum is the classic UC pattern. If your doctor notes patchy or skipped areas, that could prompt further investigation to distinguish UC from Crohn's disease.
What the Mayo Endoscopic Score Means
Your report may include a Mayo endoscopic subscore (sometimes called the Mayo endoscopic score or MES), which is the most widely used grading system for UC severity during colonoscopy. It ranges from 0 to 3. A score of 0 means normal-looking mucosa with no visible inflammation. A score of 1 indicates mild disease, with some redness, a slightly decreased vascular pattern, and mild friability. A score of 2 means moderate disease, with marked redness, absent vascular pattern, friability, and erosions. A score of 3 reflects severe disease, with spontaneous bleeding and ulceration. The goal of UC treatment is to reach a Mayo endoscopic score of 0, which represents complete mucosal healing. Research shows that a score of 0 is associated with better long-term outcomes than a score of 1, even though both are sometimes grouped together as "mucosal healing" in older studies.
Decoding Specific Findings
Several terms appear repeatedly in UC colonoscopy reports. "Erythema" means redness of the colon lining, a sign of active inflammation. "Friability" means the mucosa bleeds easily when touched by the scope, indicating inflamed, fragile tissue. "Loss of vascular pattern" refers to the disappearance of the fine network of blood vessels normally visible through healthy colon lining. When inflammation causes the mucosa to swell, those vessels become obscured. "Granularity" describes a rough, sandpaper-like texture replacing the smooth appearance of healthy tissue. "Erosions" and "ulcerations" refer to shallow and deeper breaks in the mucosal surface, respectively, with ulcerations generally indicating more severe disease activity.
Pseudopolyps and What They Signal
Your report might mention pseudopolyps, also called inflammatory or post-inflammatory polyps. These are raised islands of tissue that form after repeated cycles of inflammation and healing. They are not cancerous, but their presence tells your doctor that your colon has experienced significant past inflammation. Research has shown that pseudopolyps are associated with a higher likelihood of needing treatment escalation, so your gastroenterologist may factor them into treatment decisions.
Biopsy Results and Dysplasia
The biopsy section deserves careful attention. During a surveillance colonoscopy, your doctor takes tissue samples from multiple locations throughout the colon. The pathologist examines these under a microscope, and the key finding to look for is dysplasia, which refers to abnormal cell changes that can precede colorectal cancer. Results are typically reported as "negative for dysplasia," "low-grade dysplasia," or "high-grade dysplasia." A negative result means no precancerous changes were found. Any dysplasia finding will prompt your gastroenterologist to discuss next steps, which may include more frequent surveillance or surgical options. UC patients with long-standing disease (typically eight years or more) have an elevated colorectal cancer risk, which is why regular surveillance colonoscopies are a standard part of UC care.
Turning Your Report into Actionable Information
Understanding your colonoscopy report helps you track how your UC is responding to treatment over time. Log your colonoscopy results in Aidy after each scope. Tracking your endoscopic findings over time shows whether your treatment is achieving mucosal healing. Knowing whether your Mayo score improved from a 2 to a 1, or whether your disease extent shifted, gives you and your doctor concrete data for treatment decisions.