| Vacuolation | |
| Severity Grade 1 (minimal) | One or a few foci (or affected cells) present |
| Severity Grade 2 (mild) | More than a few foci (or affected cells) present |
| Severity Grade 3 (moderate) | Focally extensive to more diffuse area/groups of cells affected |
| Severity Grade 4 (marked) | Prominent portion of the tissue and/or cell type affected |
| Severity Grade 5 (severe) | Greater than 40% of the region/cells affected |
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.