there have been two locoregional recurrences in a mean follow-up period of 33 months ( range , 12 to 54 months ) in patients evaluated by physical examination , carcinoembryonic antigen ( cea ) levels , computed axial tomography ( cat ) scans , endoscopy , and reoperation or autopsy ( p = 0.01 ) .
C0220825
evaluated
C0031809
physical examination