Flat polyps raise questions in colon cancer screening

May 1, 2008 Diagnostic Imaging. Flat polyps raise questions in colon cancer screening Study stirs up dispute among experts over how often CT colonography and other advanced visualization tools miss nonpolypoid neoplasms BY SHALMALI PAL -------------------------------------------------------------------------------- Truly flat or depressed colorectal polyps pose a diagnostic dilemma and are always worth a closer look. A study in the Journal of the American Medical Association may have overstated the case, however, by concluding that these polyps were quite common and carried an increased cancer risk, according to CT colonography experts. "There were concerns regarding the study design and its conclusions, which seemed overreaching," said Dr. Beth McFarland, chair of the American College of Radiology's colon cancer committee. "The issues in the article are important to fully evaluate but should be kept in perspective with other larger studies, which followed patients longitudinally with more robust outcome metrics."

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