Table 1 Methylation in the CpG island encompassing the PTPRR isoform 1 start site in colorectal tumors.
Tumor type1 | No. | Methylated (%)2 | Unmethylated (%) |
|---|---|---|---|
Premalignant lesions | Â | Â | Â |
   Polypoid | 28 | 23 (82) | 5 (18) |
   Nonpolypoid | 18 | 15 (83) | 3 (17) |
Primary adenocarcinomas | 44 | 42 (95) | 2 (5) |
Liver metastases 3 | 8 | 8 (100) | 0 (0) |