Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Age—yr | |
| Median | 46 |
| Mean | 47.1 |
| Range | 24–88 |
| Histology—number (%) | |
| Adenocarcinoma | 22 (26) |
| Adenosquamous | 7 (8) |
| Squamous | 57 (66) |
| Stage—number (%) | |
| I | 25 (29) |
| II | 36 (42) |
| III | 15 (17) |
| IV | 7 (8) |
| Unknown | 3 (4) |
| Grade—number (%) | |
| 1 | 3 (4) |
| 2 | 57 (66) |
| 3 | 18 (21) |
| Ungraded | 8 (9) |
