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%)