June 7, 2011
Determining Malignancy of Ovarian Cancer
(Ivanhoe Newswire) -- PET and CT scans, which shows images of both functional and anatomical changes in the body, are useful for viewing ovarian cancer before any operations are done. Physicians can predict whether a mass is malignant, cancerous but stable, or benign using this method.
"We found that PET/CT imaging with the radiotracer 18F-FDG gave us beneficial information about the ovarian cancer stage that helped gynecologists in their treatment planning," Majbritt Frost, research technologist and lead author of the study at Aalborg Hospital Danmark in Aalborg, Denmark, was quoted as saying.
The American Cancer Society estimates that more than 21,800 American women were diagnosed with ovarian cancer and approximately 13,850 women died from the disease in 2010.
This study was conducted to explore PET imaging with a radiotracer that combines a fluorine-based medical isotope with fluorodeoxyglucose (18F-FDG), which mimics glucose as a source of energy, to determine the malignancy of adnexal masses. These are lumps in the tissue of the adnexa, or connected structures of the uterus. Most commonly these masses affect the ovaries and fallopian tubes, but they can also develop within supporting tissues.
PET imaging with 18F-FDG was able to ascertain whether lumps were malignant, because cancerous tissues are far more metabolically active than normal cells and this hyperactivity shows up as "hot spots" on PET scans.
For the purposes of this research, 104 patients with a mean age of 62 years presenting adnexal masses with the potential for ovarian cancer were imaged using PET/CT with the radiotracer 18F-FDG prior to surgery. Results of the scans were classified as either benign or malignant.
The ability to detect ovarian cancer expands hybrid molecular imaging in the field of gynecology. Already molecular imaging is useful for the staging of cervical cancer, and continuing research may one day open the door for the staging of endometrial and other cancers for women.
SOURCE: SNM's 58th Annual Metting held in San Antonio, Texas from June 4-8, 2011