Table 4.
Subsequent colorectal neoplasia events
| Neoplasia history | Subsequent CRN | Synchronous lesion | Prior lesion* |
|---|---|---|---|
| SEC | |||
| Prior or synchronous CRN | |||
| -Prior only | N = 5 | ||
| Unifocal LGD (3) | – | Unifocal LGD (3) | |
| Multifocal (LGD and SSP) | – | Unifocal LGD | |
| Multifocal LGD | – | Multifocal LGD | |
| -Prior and synchronous | N = 2 | ||
| Unifocal LGD | Unifocal LGD | Unifocal LGD | |
| Multifocal (HGD and LGD) | Multifocal indefinite | Multifocal indefinite | |
| -Synchronous only | N = 1 | ||
| Multifocal LGD | Multifocal LGD | – | |
| None | N = 7 | ||
| Unifocal LGD (4) | – | – | |
| Unifocal TSA | – | – | |
| Unifocal SSP | – | – | |
| Control | |||
| -Prior CRN | N = 8 | ||
| Unifocal LGD (5) | – | Unifocal LGD (5) | |
| Multifocal LGD (2) | – | Multifocal LGD (2) | |
| Unifocal HGD | – | Unifocal LGD TVA | |
| None | N = 3 | ||
| Unifocal LGD | – | – | |
| SSP | – | – | |
| CRC | – | – |
SEC, serrated epithelial changes; CRN, colorectal neoplasia; LGD, low grade dysplasia; SSP, sessile serrated polyp; HGD, high grade dysplasia; TSA, traditional serrated adenoma; TVA, tubulovillous adenoma; CRC, colorectal carcinoma.
*
In patients with multiple prior lesions, most recent is reported.