Collaborative Hypertext of Radiology

adenomatous colon polyps

prob. of malignancy by size and type

                                          Size (cm)
                                 < 1         1-2         > 2
                                 ---------------------------

                 tubular          1%         10%         34%

                 mixed (TV)       4%          9%         45%

                 villous         10%         10%         54%

most colon polyps (90%) are hyperplastic (size < 5 mm)

Charles E. Kahn, Jr., MD - 2 February 1995
Last updated: 1 October 2013