Table 1: Distribution of tumor types according to differentiation grades.

Differentiation grade
Well Moderately Poorly
Adenocarcinoma 20
(34.5%)
21
(36.2%)
17
(29.3%)
SCC 5
(16.7%)
12
(40.0%)
13
(43.3%)
Total 25
(28.4%)
33
(34.1%)
30
(37.5%)