Table 1.
Tissue Samples Used in This Study
| Class | Tissue | Postchemotherapy | Patient Group | Number of Samples |
|---|---|---|---|---|
| 1: NN | Histologically normal squamous esophageal mucosa (“normal tissue”) | N | Controls | 68 |
| 2: NB | Histologically normal squamous esophageal mucosa (“normal tissue”) | N | Barrett's patients | 7 |
| 3: NCpr | Histologically normal squamous esophageal mucosa (“normal tissue”) | N | EAC patients | 30 |
| 4: BB | Nondysplastic Barrett's tissue | N | Barrett's patients | 7 |
| 5: BCpr | Nondysplastic Barrett's tissue | N | EAC patients | 4 |
| 6: CCpr | EAC tissue | N | EAC patients | 28 |
| 7: NCpo | Histologically normal squamous esophageal mucosa (“normal tissue”) | Y | EAC patients | 29 |
| 8: BCPo | Nondysplastic Barrett's tissue | Y | EAC patients | 9 |
| 9: CCPo | EAC tissue | Y | EAC patients | 29 |
Abbreviations: First letter indicates tissue type: N: normal tissue. B: Barrett's tissue; C: (cancer) EAC tissue. Second letter indicates patient type: N: normal controls; C: EAC patients; B: Barrett's patients (in absence of EAC). Final two letters: pr: prechemotherapy; po: postchemotherapy.