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.
| Inclusion criteria | Exclusion criteria |
| All brain biopsies with histopathological diagnosis of glioblastoma multiforme from 2015 to 2020 | Extremely small biopsies (<5 mm) |
| Glioblastoma multiforme cases with single tissue block | |
| Biopsies of the brain with histopathological diagnoses other than glioblastoma multiforme |
