One of the moot important goals of modem gynexologic oncology is the adequate management of ocarian cancer. This includes early detection and differenciation of recurrence or residurd turnur. A promising method is availaible today with the use of mctabolic suubstrates used by tumor cells that are labeled with positron emittillg isotopes and a special instrument capable of detecting the radiations in vivo. Measuring tumor metabolic characteristics appear also to diffnencinte tumor recurrence or reeidual tumor from surgical or irradiation changes which is important since this wil1 not be defferentiaited by other modalities such ac CT or MRI. The goal of this study was to rletennine the potential utility uf whole-body PET using the giucose malogue 2-(18F)-fluoro-2-deoxy-D-glucoae(F-18-FDO for the detection of primey, metastatic, and recurrent ovarian cancer. Six patients had imaging studies prior to laparotomy for suspected ovarian cancer. PET(Positron Emission Tomogrnphy) scans were done with an ECAT 921(Emission Computed Axial Tomograpy 921, Sieinens/CTI. The result of this study show good correla- tion between PET nnd pathological findirs. The tumor detection rate of CT, MRI, CA-125, PET for ocarian cancer was 50%, 75%, 25%, 100% respectively. In summary, this work indicates that PET may be useful in the rnanagement of patients with ovwrian cancers by idengying occult foci of rnetabolically active tumor that do not appear on morphological studies.