Table 2.
Types of CCFs are categorized according to frequency of their drainage pathways.
| Type of CCF |
Drainage pathway | ||||
|---|---|---|---|---|---|
| Anterior | Inferior | Contralateral | Posterior | Superior | |
| Type A | 4 | 4 | 2 | 3 | 2 |
| Type B | 4 | 6 | 4 | 0 | 0 |
| Type C | 1 | 0 | 1 | 0 | 0 |
| Type D | 1 | 1 | 0 | 0 | 0 |
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.