Infraportal form | 94 (75.8 %) | ||||
Supraportal form | 24 (19.4 %) | ||||
Completely supraportal | 9 (7.3 %) | ||||
Partially supraportal | 15 (12.1 %) | ||||
A6a of infraportal course and A6bc7 of supraportal course | 11 (8.9 %) | ||||
A6 of infraportal course and A7 of supraportal course | 4 (3.2 %) | ||||
Unclear form (because of cancer invasion) | 6 (4.8 %) |