Bethesda, MD (November 1, 2007) Diabetes is a very common illness that affects more than 20 million people in the U.S. and it is estimated an additional 54 million Americans have pre-diabetes, a condition that occurs when a person's blood glucose levels are higher than normal but not high enough for a diagnosis of type 2 diabetes. Therefore, it is important to determine whether glucose and insulin levels are associated with a higher risk of colon polyps, the precursor lesions to colon cancer. According to the results of a study published in Gastroenterology, patients with high levels of insulin and glucose are at increased risk of developing recurrent colorectal adenomas, or tumors, with elevated glucose providing the strongest risk factor for recurrence of these lesions.
This is the first study to determine whether elevated glucose or insulin as measured when or shortly after a patient has had polyps removed during a baseline colonoscopy procedure increases their risk for subsequent recurrence of pre-cancerous growths in the colon, according to Andrew Flood, PhD, of the University of Minnesota and lead author of the study. The results of our study have important clinical implications with respect to maintenance of glycemic control in patients with a history of colorectal polyps.
In particular, study subjects who had even modestly impaired fasting glucose (an early sign of insulin resistance, itself a precursor of diabetes) had an especially large increased risk of recurrence of the types of polyps that are most likely to progress to invasive cancer. Therefore, the clinical management of glycemic control is important in reducing the risk of tumor recurrence and colorectal cancer. The glucose levels observed by researchers in the Polyp Prevention Trial, of which this study was a subset analysis, and the levels of exposure that led to the increased risk, were not unusually elevated. Researchers used a glucose concentration of 99 mg/dl as
|Contact: Aimee Frank|
American Gastroenterological Association