The fragile X CGG repeat shows a marked level of instability in hereditary non-polyposis colorectal cancer patients.


The allelic variation of the FMR1 CGG repeat was investigated by small-pool PCR in nonneoplastic peripheral blood leukocytes from HNPCC patients and matched controls for similar CGG repeat lengths. The allelic variation for repeat lengths appears to be roughly twice as frequent in HNPCC patients as in controls, especially when patients are mutated in hMLH1… (More)


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