| Groups | Type I | Type II | Type III | Type IV | ||||
|---|---|---|---|---|---|---|---|---|
| Cases | % | Cases | % | Cases | % | Cases | % | |
| Adenocarcinoma | 15 | 50.0 | 8 | 26.7 | 7 | 23.3 | 10 | 33.3 |
| Squamous-cell carcinoma | 12 | 70.6 | 0 | 0 | 0 | 0 | 4 | 23.5 |
| Miscellaneous | 4 | 66.7 | 0 | 0 | 1 | 16.7 | 1 | 16.7 |
| Toal | 31 | 58.5 | 8 | 15.1 | 8 | 15.1 | 15 | 28.3 |
Counting was recorded separately when a case had more than one type.