The optimal regimen and frequency of follow-up examinations are not well defined because the impact on patient survival is not clear and the quality of data is poor.[31,32,33] New surveillance methods, including CEA immunoscintigraphy  and positron emission tomography, are under clinical evaluation.
Other PDQ summaries containing information related to colon cancer include the following:
Colorectal Cancer Prevention
Colorectal Cancer Screening
Genetics of Colorectal Cancer
Unusual Cancers of Childhood Treatment (childhood cancer of the colon)
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