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.
Search strategy and results as on 13 March 2008
| # | Search string | PubMed/MEDLINE | Embase |
|---|---|---|---|
| 1 | Fluorodeoxyglucose OR 2-fluoro-2-deoxy-D-glucose OR FDG OR positron emission tomography OR positron-emission tomography OR PET | 39,616 | 46,549 |
| 2 | Computed tomography OR computerized tomography OR computed tomographic OR CT OR CAT | 430,940 | 317,859 |
| 3 | Unknown primary OR unidentified primary OR occult primary OR unknown origin OR unidentified origin | 32,203 | 25,105 |
| 4 | #1 AND #2 AND #3 | 230 | 185 |
