Table 4. Anatomic Stage/Prognostic Groupsa
| Squamous Cell Carcinoma b |
| Stage | T | N | M | Grade | Tumor Locationc |
| 0 | Tis (HGD) | N0 | M0 | 1, X | Any |
| IA | T1 | N0 | M0 | 1, X | Any |
| IB | T1 | N0 | M0 | 2–3 | Any |
| T2–3 | N0 | M0 | 1, X | Lower, X |
| IIA | T2–3 | N0 | M0 | 1, X | Upper, middle |
| T2–3 | N0 | M0 | 2–3 | Lower, X |
| IIB | T2–3 | N0 | M0 | 2–3 | Upper, middle |
| T1–2 | N1 | M0 | Any | Any |
| IIIA | T1–2 | N2 | M0 | Any | Any |
| T3 | N1 | M0 | Any | Any |
| T4a | N0 | M0 | Any | Any |
| IIIB | T3 | N2 | M0 | Any | Any |
| IIIC | T4a | N1–2 | M0 | Any | Any |
| T4b | Any | M0 | Any | Any |
| Any | N3 | M0 | Any | Any |
| IV | Any | Any | M1 | Any | Any |
| Adenocarcinoma |
| Stage | T | N | M | Grade |
| 0 | Tis (HGD) | N0 | M0 | 1, X |
| IA | T1 | N0 | M0 | 1–2, X |
| IB | T1 | N0 | M0 | 3 |
| T2 | N0 | M0 | 1–2, X |
| IIA | T2 | N0 | M0 | 3 |
| IIB | T3 | N0 | M0 | Any |
| T1–2 | N1 | M0 | Any |
| IIIA | T1–2 | N2 | M0 | Any |
| T3 | N1 | M0 | Any |
| T4a | N0 | M0 | Any |
| IIIB | T3 | N2 | M0 | Any |
| IIIC | T4a | N1–2 | M0 | Any |
| T4b | Any | M0 | Any |
| Any | N3 | M0 | Any |
| IV | Any | Any | M1 | Any |
| HGD = high-grade dysplasia. |
| aReprinted with permission from AJCC: Esophageal and esophagogastric junction. In: Edge SB, Byrd DR, Compton CC, et al., eds.: AJCC Cancer Staging Manual. 7th ed. New York, NY: Springer, 2010, pp 103-15. |
| bOr mixed histology, including a squamous component or not otherwise specified. |
| cLocation of the primary cancer site is defined by the position of the upper (proximal) edge of the tumor in the esophagus. |