Our prior study of MUC1 and MUC2 in CRCs showed that MUC1 is an indicator of poor prognosis for Caucasian patients, but there is, for African American or Caucasian patients, no prognostic value for MUC2 when colon and rectal cancers along with MCAs and NMCAs are combined.7 This evidence concerns the gene MUC1 and rectal cancer.