- Open Access
Positron emission tomography in ovarian cancer: 18F-deoxy-glucose and 16α-18F-fluoro-17β-estradiol PET
© Yoshida et al; licensee BioMed Central Ltd. 2009
- Received: 13 January 2009
- Accepted: 16 June 2009
- Published: 16 June 2009
The most frequently used molecular imaging technique is currently 18F-deoxy-glucose (FDG) positron emission tomography (PET). FDG-PET holds promise in the evaluation of recurrent or residual ovarian cancer when CA125 levels are rising and conventional imaging, such as ultrasound, CT, or MRI, is inconclusive or negative. Recently, integrated PET/CT, in which a full-ring-detector clinical PET scanner and a multidetector helical CT scanner are combined, has enabled the acquisition of both metabolic and anatomic imaging data using one device in a single diagnostic session. This can also provide precise anatomic localization of suspicious areas of increased FDG uptake and rule out false-positive PET findings. FDG-PET/CT is an accurate modality for assessing primary and recurrent ovarian cancer and may affect management. FDG-PET/CT may provide benefits for detection of recurrent of ovarian cancer and improve surgical planning. And FDG-PET has been shown to predict response to neoadjuvant chemotherapy and survival in advanced ovarian cancer. This review focuses on the role of FDG-PET and FDG-PET/CT in the management of patients with ovarian cancer. Recently, we have evaluated 16α-18F-fluoro-17β-estradiol (FES)-PET, which detects estrogen receptors. In a preliminary study we reported that FES-PET provides information useful for assessing ER status in advanced ovarian cancer. This new information may expand treatment choice for such patients.
- Positron Emission Tomography
- Ovarian Cancer
- Positive Predictive Value
- Standardize Uptake Value
- Negative Predictive Value
Ovarian cancer is the second most common gynecologic malignancy. It has a relatively poor prognosis, accounting for approximately half of all deaths related to gynecologic cancer . Conventional imaging with ultrasonography (US), computed tomography (CT) and magnetic resonance imaging (MRI) has been used, but ability to diagnose the primary tumor and accurately stage the ovarian cancer are variable. Such conventional imaging tools are also commonly used to guide the management of ovarian cancer patients. However, concerns remain that these imaging techniques may provide false negative results because of their inability to identify disease when normal anatomic landmarks have been lost because of surgery or radiation, or give false positive results related to their inability to distinguish between viable tumor masses and masses of necrotic or scar tissue [1–3]. New diagnostic imaging tools for primary and recurrent ovarian cancer have therefore been anticipated.
Functional imaging methods such as positron emission tomography (PET) can establish the metabolic or functional parameters of tissue. Instead of using anatomical deviations to identify areas of abnormality, PET uses positron-emitting radiolabeled molecules to display molecular interactions of biological processes in vivo. The most commonly used radioisotope tracer is 18F-deoxy-glucose (FDG), a glucose analog which is preferentially taken up by and retained within malignant cells. Depending on the area or organ under study, baseline glucose metabolism may be low, further highlighting the difference between normal background tissue and tumor . However, FDG-PET has some limitations. It does not provide anatomic information, and precise localization of any suspicious lesions may accordingly be difficult. FDG-PET is also impaired by the presence of increased glucose uptake in physiologic, non-physiologic, or inflammatory states [4–9]. Recently, integrated PET/CT, in which a full-ring-detector clinical PET scanner and a multidetector helical CT scanner are combined, has enabled the acquisition of both metabolic and anatomic imaging data using one device in a single diagnostic session, and this provides precise anatomic localization of suspicious areas of increased FDG uptake and eliminates false-positive PET findings [9–15]. Bar-Shalom et al. demonstrated that FDG-PET/CT provided additional information compared with the separate interpretation of PET and CT in 178 of 53 sites (30%) imaged in 99 of 40 patients (49%). FDG-PET/CT improved characterization of equivocal lesions as definitely benign in 10% of sites and as definitely malignant in 5%. It precisely defined the anatomic location of malignant FDG uptake in 6% of sites, and it led to retrospective lesion detection on PET or CT in 8%. The results of FDG-PET/CT had an impact on the management of 28 patients (14%) whose management changed as a result of FDG-PET/CT, obviating the need for further evaluation in 5 (2%), guiding further diagnostic procedures in 7 (3%), and assisting in planning therapy for 16 patients (8%) . Thus, compared with structural imaging techniques, FDG-PET and, moreover, FDG-PET/CT have the potential to deliver greater accuracy in diagnosis, staging, and management decisions in ovarian cancer.
In this review article, the role of FDG-PET and FDG-PET/CT in the diagnosis, staging, and management of ovarian cancer will be discussed. For conciseness we will focus on research published within the past decade and draw extensively on the texts and summaries of the articles referenced. Less recent citations are also included when deemed useful to provide background information.
16α-[18F]fluoro-17β-estradiol (FES) is a radiopharmaceutical that binds to the estrogen receptor (ER), thereby demonstrating the existence of this receptor . FES can help diagnose ER-positive breast cancer and determine the efficacy of hormonal therapy in these patients . In this article, we also discuss our preliminary studies indicating the usefulness of FES-PET imaging in the diagnosis of gynecologic cancer and in determining the efficacy of hormonal therapy [18, 19], as a future PET method for evaluating ovarian cancer.
Imaging protocol for ovarian tumors
FDG is excreted through the urinary tract and also physiologically accumulates in the bowel. Intense activity in the urinary or gastrointestinal tract can interfere with the optimal evaluation of the abdomen and pelvis. The most simple solution to this is to request that the patient empties their bladder just prior to imaging and to initiate imaging from the pelvis, before the bladder is full .
Other useful techniques to avoid false positives are bladder catheterization and furosemide administration. Koyama et al. reported that continuous bladder irrigation is useful for eliminating FDG activity in the bladder during FDG-PET (FDG activity in the urinary tract was eliminated in 80% of patients). The technique had satisfactory diagnostic utility with 100% sensitivity, 86% specificity and 98% accuracy for differentiating malignant from nonmalignant lesions. However, there is no foolproof method for avoiding bowel uptake .
It is now hoped that FDG-PET/CT will increase both sensitivity and specificity of PET by identifying physiologic tracer uptake and delineating cancerous lesions with low or absent FDG uptake 
Physiological FDG uptake in the ovaries
Screening for ovarian malignancy
Conventional morphological imaging modalities including US, CT, and MRI have been widely used to determine whether a suspicious ovarian tumor is malignant [1–3]. US performed in asymptomatic women as a screening test, followed by physical examination has a high sensitivity for differentiating malignant from benign ovarian processes, (82 – 96% in the literature, [25–27]), but specificity has varied widely among studies, from 52% to 93% [25–27].
Color and pulse Doppler techniques may aid in the diagnosis of ovarian cancer. Buy et al. compared gray-scale ultrasound with duplex and color Doppler in the evaluation of adnexal masses. Adding color Doppler to gray-scale morphologic information increased specificity from 82% to 97% and increased positive predictive value (PPV) from 63% to 97%, but duplex Doppler indices provided no further information [25–27]. A large meta-analysis comparing morphologic assessment, Doppler ultrasound, color Doppler flow imaging, and combined techniques for characterization of adnexal masses found combined techniques had the best diagnostic performance, followed in decreasing order by morphologic assessment alone, Doppler indices, and color Doppler .
CT and MRI have been utilized to further evaluate ovarian masses [1–3]. Although CT is more readily available and cost-effective than MRI, its usefulness in differentiating ovarian processes is limited because soft-tissue contrast is relatively poor when compared with MRI, and MRI therefore has higher diagnostic accuracy [1–3]. Reports in the literature differ with regard to the sensitivity and specificity of MRI in the differentiation of benign and malignant adnexal lesions, ranging from 85% to 95% for sensitivity and from 87% to 96% for specificity [28–31].
The sensitivity of FDG-PET in the detection of ovarian cancer was 78% in our study ; this was lower than the results reported in the literature, which have been in the range of 83% to 86% [33–37]. We suspect that the reason for the comparatively low sensitivity in our study was that our study population included a large number of false negative cases, such as patients with early mucinous adenocarcinoma and borderline mucinous adenocarcinoma. Rieber et al. reported that early carcinomas, mucinous adenocarcinomas, and particularly borderline tumors, present a problem because these tumors presumably lack the typical pattern of FDG uptake as a result of the small amount of transformed tissue , so they are likely to give false-negative results. Moreover, false-positive findings with FDG-PET occurred for endometriomas and dermoid cysts in our study. When the ovary is involved in an inflammatory process, inflammatory exudate may be accompanied by FDG uptake in these regions . In addition, schwannomas, serous cystadenomas, thecomas, mucinous cystadenomas, and corpus luteum cysts show incidentally increased glucose metabolism has been reported in the literature [33–37].
In screening for ovarian cancer, US is the most important modality. MRI or FDG-PET, in addition to US, can provide further information about ovarian tumors and improve specificity. However, our study showed that the addition of FDG-PET to MRI does not yield additional information for the diagnosis of ovarian masses after US .
Recently, Castellucci et al. assessed the accuracy of FDG-PET/CT in distinguishing malignant from benign pelvic lesions, compared with transvaginal ultrasonography (TVUS). Adding FDG-PET/CT increased specificity from 61% to 100%, negative predictive value (NPV) from 78% to 81%, PPV from 80% to 100%, and accuracy from 80% to 92%. They concluded that FDG-PET/CT provides additional information to TVUS in the differential diagnosis of benign from malignant pelvic lesions . In conclusion, US is the most important modality in screening for ovarian malignancy. Although some investigators consider FDG-PET useful in the differential diagnosis of malignancy, most studies have shown that it is of little value [32–36]. However, FDG-PET/CT may provide useful additional information when performed after TVUS in the differential diagnosis of malignancy .
PET in staging
A major problem in ovarian cancer is that a high proportion (75%) of patients have advanced stage disease at the time of diagnosis, which results in a 5-year survival rate of only 41% . Primary debulking surgery is not the only treatment option for ovarian cancer, and patients with bulky, nonresectable disease will not benefit from primary surgery . In addition, there is little survival benefit if the debulking is not optimal. The results of studies regarding therapy for patients with advanced cancer of the pancreas and esophagus provide clear evidence that neoadjuvant chemotherapy before surgery enables downstaging and thus improves operability as well as prognosis. The results of these studies strongly suggest the need to consider neoadjuvant chemotherapy in patients with advanced ovarian cancer . Thereafter, accurate staging of patients with ovarian cancer before treatment is needed to determine appropriate treatment for those who will potentially benefit from it.
Our study is the first to show that the addition of FDG-PET to CT improves the staging accuracy of ovarian cancer . The reason for this improvement was that FDG-PET facilitated detection of metastases outside the pelvis. For intrapelvic lesions, the sensitivity, specificity, PPV, NPV, and accuracy of CT alone increased from 72, 81, 48, 92, and 79%, respectively, to 76, 82, 50, 94, and 81%, respectively, when FDG-PET was added. Similarly, for lesions outside the pelvis, the sensitivity, specificity, PPV, NPV, and accuracy of CT alone increased from 24, 95, 44, 88, and 85%, respectively, to 63, 98, 88, 93, and 93%, respectively, with the addition of FDG-PET . Although our study did not provide an evaluation on a per patient basis or a statistical analysis, to the best of our knowledge, it is the first to show that the addition of FDG-PET to CT improves the staging accuracy of ovarian cancer . Recently, Kitajima et al. also reported that FDG-PET/contrast-enhanced CT was a more accurate imaging modality for staging ovarian cancer and was more useful for selecting appropriate treatment than enhanced CT alone .
In conclusion, FDG-PET is a useful and promising tool but not an established procedure in the staging of ovarian cancer patients. As studies in this field have been small-scale and have had variable results, a multicenter study with more data and showing clinical utility for routine use is needed before the procedure can be applied routinely for patients with confirmed or suspected ovarian cancer [33, 39–43].
Diagnosis of recurrent ovarian cancer
Recurrent ovarian cancer is almost never curable, but early detection of recurrence theoretically increases the chance that salvage treatment will result in prolonged remission and sustained quality of life. Conventional imaging modalities often give nonspecific results and are suboptimal for the reliable detection of peritoneal recurrence. The identification of more accurate imaging modalities should improve management decisions for patients with recurrent ovarian cancer.
In 2002 we reported that FDG-PET was useful for following up an ovarian cancer patient in whom the only feature suspicious of recurrence was a rising CA125 level within the normal range . Havrilesky et al. performed a meta-analysis to assess the diagnostic performance of FDG-PET in comparison with that of CT and MRI in patients with ovarian cancer. They concluded that FDG-PET did not appear to be useful in the routine surveillance of patients with a history of ovarian cancer, and that it was unlikely to improve the sensitivity of conventional modalities to detect microscopic intraperitoneal disease. There is fair evidence to support the use of PET for the detection of recurrent ovarian cancer when the CA-125 is elevated and conventional imaging is negative or equivocal, although whether this results in improved patient outcome is unclear .
The use of FDG-PET/CT for detecting recurrent ovarian cancer was first described by Makhija et al. in 2002 . In 2008, Gu et al. performed a systemic meta-analysis to assess the accuracy of CA-125, PET alone, FDG-PET/CT, CT alone, and MRI in diagnosing recurrent ovarian carcinoma. They demonstrated that CA-125 had the highest pooled specificity, 0.93 (95%CI: 0.89 – 0.95), and FDG-PET/CT had the highest pooled sensitivity, 0.91 (95% CI: 0.88 – 0.94). They concluded FDG-PET/CT might be a useful supplement to current surveillance techniques, particularly for patients with an increasing CA-125 level and negative CT or MRI. However, regarding diagnostic accuracy, interpreted CT may have limited additional value over FDG-PET in detecting recurrent ovarian cancer . Recently, Kitajima et al. reported that PET/contrast-enhanced CT was able to detect more malignant lesions than FDG-PET/CT or enhanced CT alone in recurrent ovarian cancer. Therefore, PET/contrast-enhanced CT could lead to changes in the subsequent clinical management of 39% of these patients. Improved diagnostic accuracy with PET/contrast-enhanced CT impacted management in 16 patients (12%) diagnosed by enhanced CT alone and in three patients (2%) diagnosed by PET/non-contrast-enhanced CT . They concluded that PET/contrast-enhanced CT is an imaging modality with favorable accuracy for staging and for assessing ovarian cancer recurrence when compared with PET/non-contrast-enhanced or enhanced CT.
The following information shows the diagnosis of primary ovarian cancer
Ultrasound (color and pulsed Doppler)
85% – 95%
87% – 96%
58% – 86%
54% – 86%
88% – 100%
85% – 88%
The following information shows the diagnosis of recurrent/metastatic ovarian cancer
40% – 91%
46% – 100%
55% – 91%
46% – 100%
45% – 100%
50% – 100%
41% – 91%
71% – 100%
Usefulness of FDG-PET for assessing malignant activity
SUV is the most common PET parameter measured in the clinical setting. Its calculation is simple, and most contemporary FDG-PET/CT scanners display the imaging in these units, provided the injected dose and the patient weight have been entered when setting up the PET acquisition . The role of SUV in PET examination has been discussed at length; however, doubts remain due to factors that can influence SUV calculation and reproducibility. A study by Nahmias et al.  investigated the reproducibility of SUV in malignant tumors and found that a number of factors other than the natural history of the tumor could cause variability in the measured SUV. These factors included fluctuations in plasma glucose and patient weight, errors in repositioning regions of interest (ROI) or image registration, and variations in the uptake period. They concluded that repeated measurements of mean SUV performed a few days apart were reproducible. A decrease of 0.5 SUV is statistically significant and may be considered when establishing thresholds to predict success of chemotherapy in patients with cancer.
We have previously assessed whether FDG-PET is useful for assessing malignant activity and gathering prognostic information in ovarian cancer . We evaluated whether FDG uptake, quantified as SUV by PET in ovarian epithelial tumors, correlates with clinical stage [51, 52], tumor grade , cell proliferation [54–56], or glucose metabolism , all of which are reported to be biomarkers for response to chemotherapy, prognosis, and overall survival in ovarian cancer patients. Epithelial ovarian tumor specimens were graded histopathologically, and immunohistochemistry for MIB-1 (a proliferation index marker) and GLUT-1 (glucose transporter marker) was performed. The correlations between FDG uptake and clinical stage, GLUT-1 expression, MIB-1 labeling index (LI), and histological grade were determined. No positive correlation was observed between FDG uptake and clinical stage (P = 0.14). On the other hand, the intensity of GLUT-1 expression (r = 0.76, P = 0.001), MIB-1 LI (r = 0.457, P = 0.014), and histological grade (r = 0.692, P = 0.005) showed statistically significant positive correlations with FDG uptake. Stepwise logistic regression analysis revealed that the expression of GLUT-1 transporters was the strongest predictor of positive FDG uptake (r = 0.760, P = 0.0004) .
A study of GLUT-1 expression in ovarian carcinoma by Canturia et al. showed that GLUT-1 status is an independent prognostic factor of response to chemotherapy in advanced ovarian carcinoma, and that patients over-expressing this marker have a significantly shorter disease-free survival rate . Furthermore, Avril et al. showed that FDG-PET could predict response to neoadjuvant chemotherapy and survival in advanced ovarian cancer. Using a threshold for decrease in SUV from baseline of 20% after the first course, the median overall survival was found to be 38.3 months in responders (23.1 months in non-responders). At a threshold of 55% decrease in SUV after the third cycle, median overall survival was 38.9 months in responders (19.7 months in non-responders). Although the number of cases was small, this prospective study showed that sequential FDG-PET predicted patient outcome as early as after the first cycle of neoadjuvant chemotherapy and was more accurate than CA-125.
In conclusion, glucose consumption, as determined by analysis of SUV in FDG-PET, may be a non-invasive biomarker that can predict response to chemotherapy and survival in ovarian cancer.
Cost-effectiveness evaluation of FDG-PET in the management of patients with ovarian cancer
Patients with advanced ovarian cancer who have completed a planned course of chemotherapy have frequently undergone a systematic surgical exploration and may be asymptomatic. About 36% to 73% of patients may have persistent disease detected at second-look procedures. Patients with residual disease should undergo continuous adjunctive therapy, while those without disease may discontinue adjunctive therapy. The cost-effectiveness and value of FDG-PET as a substitute for a second-look procedure have therefore been explored [14, 60, 61]. A detailed cost analysis of management of ovarian cancer with comparison of FDG-PET and second-look procedure was performed by Smith et al. . They demonstrated that FDG-PET led to a decrease in the proportion of patients who underwent unnecessary laparotomy from 70% to 5%; 35% of patients underwent the less-invasive procedure of laparoscopy instead of laparatomy. Moreover, Kim et al.  reported the prognostic value of FDG-PET compared with that of a second-look procedure in patients with advanced ovarian cancer treated with chemotherapy. They concluded that PPV was 93% and NPV was 70% for FGD-PET, with no significant differences in progression-free interval between FDG-PET groups and second-look procedures. Hence FDG-PET appears to be useful and cost effective in the diagnosis of recurrent ovarian cancer.
A new PET tracer: potential applications in determining ER status
The sensitivity of ovarian cancer to hormonal therapy has a real, although modest, role in the treatment of advanced ovarian cancers resistant to chemotherapy. Many agents have been evaluated, including antiestrogens, estrogens, progesterones, androgens, aromatase inhibitors, and gonadotropin releasing hormone agonists (GnRH). As anticancer agents, hormonal therapies produce an approximate 10% response rate in previously treated patients. A correlation may exist between the presence of hormone receptors and a response to therapy . Thus, knowledge of hormone receptor status, for example estrogen receptor (ER) status, is critically important for the treatment of ovarian cancer. Tissue sampling is essential but difficult because it is associated with significant morbidity and sampling error. The most commonly used molecular imaging technique in body imaging is currently FDG-PET. This has become the method of choice for staging and restaging in ovarian cancer, and it also has become extremely valuable in monitoring the response to anticancer agents. New PET agents, such as 16α-18F-fluoro-17β-estradiol (FES) have potential in the evaluation of response to hormonal therapy for ovarian cancer after FDG-PET. Although we do not have any experience of the use of FES-PET in patients on long-term hormone therapy to treat osteoporosis, we have already evaluated FES-PET for patients without any previous treatment in the differential diagnosis of benign and malignant uterine tumors .
FDG-PET holds promise in the evaluation of cancer spread or recurrent or residual disease when other radiographic data are uncertain. FDG-PET/CT might be a useful supplemental investigation to detect primary and recurrent ovarian cancer earlier than FDG-PET and other conventional imaging tools. In addition, FES-PET may have the potential to provide useful information about hormone status in advanced ovarian cancer.
We wish to express our sincere thanks to Dr. Yasuhisa Fujibayashi, Director, the Biomedical Imaging Research Center, and all staff of our department of gynecologic oncology.
- Ozols RF, Rubin SC, Thomas GM, Robboy SJ: Epithelial ovarian cancer. In Principles and Practice of Gynecologic Oncology. 4th edition. Edited by: William JH, Carlos AP, Robert CY. Philadelphia, Lippincott Williams & Wilkins; 2004:841–918.Google Scholar
- Bragg DG, Hricak H: Imaging in gynecologic malignancies. Cancer 1993, 71: 1648–51.PubMedView ArticleGoogle Scholar
- Togashi K: Ovarian cancer: the clinical role of US, CT, and MRI. Eur Radiol. 2003, 13 Suppl 4: L87-L104. 10.1007/s00330-003-1964-yPubMedView ArticleGoogle Scholar
- Cook GJ, Maisey MN, Fogelman I: Normal variants, artefacts and interpretative pitfalls in PET imaging with 18-fluoro-2-deoxyglucose and carbon-11 methionine. Eur J Nucl Med 1999, 26: 1363–78. 10.1007/s002590050597PubMedView ArticleGoogle Scholar
- Kostakoglu L, Agress H Jr, Goldsmith SJ: Clinical role of FDG PET in evaluation of cancer patients. Radiographics 2003, 23: 315–40. 10.1148/rg.232025705PubMedView ArticleGoogle Scholar
- Nakamoto Y, Saga T, Fujii S: Positron emission tomography application for gynecologic tumors. Int J Gynecol Cancer 2005, 15: 701–9. 10.1111/j.1525-1438.2005.00245.xPubMedView ArticleGoogle Scholar
- Pandit-Taskar N: Oncologic imaging in gynecologic malignancies. J Nucl Med 2005, 46: 1842–50.PubMedGoogle Scholar
- Kumar R, Chauhan A, Jana S, Dadparvar S: Positron emission tomography in gynecological malignancies. Expert Rev Anticancer Ther 2006, 6: 1033–44. 10.1586/1473718.104.22.1683PubMedView ArticleGoogle Scholar
- Mironov S, Akin O, Pandit-Taskar N, Hann LE: Ovarian cancer. Radiol Clin North Am 2007, 45: 149–66. 10.1016/j.rcl.2006.10.012PubMedView ArticleGoogle Scholar
- Beyer T, Townsend DW, Brun T, Kinahan PE, Charron M, Roddy R, Jerin J, Young J, Byars L, Nutt R: A combined PET/CT scanner for clinical oncology. J Nucl Med 2000, 41: 1369–79.PubMedGoogle Scholar
- Bar-Shalom R, Yefremov N, Guralnik L, Gaitini D, Frenkel A, Kuten A, Altman H, Keidar Z, Israel O: Clinical performance of PET/CT in evaluation of cancer: additional value for diagnostic imaging and patient management. J Nucl Med. 2003,44(8):1200–1209.PubMedGoogle Scholar
- Yamamoto Y, Oguri H, Yamada R, Maeda N, Kohsaki S, Fukaya T: Preoperative evaluation of pelvic masses with combined 18F-fluorodeoxyglucose positron emission tomography and computed tomography. Int J Gynaecol Obstet 2008, 102: 124–7. 10.1016/j.ijgo.2008.02.019PubMedView ArticleGoogle Scholar
- Iagaru AH, Mittra ES, McDougall IR, Quon A, Gambhir SS: 18F-FDG PET/CT evaluation of patients with ovarian carcinoma. Nucl Med Commun 2008, 29: 1046–51. 10.1097/MNM.0b013e32831089cbPubMed CentralPubMedView ArticleGoogle Scholar
- Basu S, Rubello D: PET imaging in the management of tumors of testis and ovary: current thinking and future directions. Minerva Endocrinol 2008, 33: 229–56.PubMedGoogle Scholar
- Lucignani G: FDG-PET in gynaecological cancers: recent observations. Eur J Nucl Med Mol Imaging 2008, 35: 2133–9. 10.1007/s00259-008-0929-4PubMedView ArticleGoogle Scholar
- Tsuchida T, Okazawa H, Mori T, Kobayashi M, Yoshida Y, Fujibayashi Y, Itoh H: In vivo imaging of estrogen receptor concentration in the endometrium and myometrium using FES PET – influence of menstrual cycle and endogenous estrogen level. Nucl Med Biol 2007, 34: 205–10. 10.1016/j.nucmedbio.2006.12.003PubMedView ArticleGoogle Scholar
- Mortimer JE, Dehdashti F, Siegel BA, Trinkaus A, Katzenellenbogen JA, Welch MJ: Metabolic flare: indicator of hormone responsiveness in advanced breast cancer. J Clin Oncol 2001, 19: 2797–2803.PubMedGoogle Scholar
- Yoshida Y, Kurokawa T, Sawamura Y, Shinagawa A, Okazawa H, Fujibayashi Y, Kotsuji F: The positron emission tomography with F18 17beta-estradiol has the potential to benefit diagnosis and treatment of endometrial cancer. Gynecol Oncol 2007, 104: 764–6. 10.1016/j.ygyno.2006.10.024PubMedView ArticleGoogle Scholar
- Tsujikawa T, Yoshida Y, Mori T, Kurokawa T, Fujibayashi Y, Kotsuji F, Okazawa H: Uterine tumors: pathophysiologic imaging with 16alpha-[18F]fluoro-17beta-estradiol and 18F fluorodeoxyglucose PET – initial experience. Radiology 2008, 248: 599–605. 10.1148/radiol.2482071379PubMedView ArticleGoogle Scholar
- Koyama K, Okamura T, Kawabe J, Ozawa N, Torii K, Umesaki N, Miyama M, Ochi H, Yamada R: Evaluation of 18F-FDG PET with bladder irrigation in patients with uterine and ovarian tumors. J Nucl Med 2003, 44: 353–8.PubMedGoogle Scholar
- Schöder H, Gönen M: Screening for cancer with PET and PET/CT: potential and limitations. J Nucl Med 2007, 48: 4–18. 10.2967/jnumed.107.044446View ArticleGoogle Scholar
- Lerman H, Metser U, Grisaru D, Fishman A, Lievshitz G, Even-Sapir E: Normal and abnormal 18F-FDG endometrial and ovarian uptake in pre- and postmenopausal patients: assessment by PET/CT. J Nucl Med 2004, 45: 266–71.PubMedGoogle Scholar
- Nishizawa S, Inubushi M, Okada H: Physiological 18F-FDG uptake in the ovaries and uterus of healthy female volunteers. Eur J Nucl Med Mol Imaging 2005, 32: 549–56. 10.1007/s00259-004-1703-xPubMedView ArticleGoogle Scholar
- Kim SK, Kang KW, Roh JW, Sim JS, Lee ES, Park SY: Incidental ovarian 18F-FDG accumulation on PET: correlation with the menstrual cycle. Eur J Nucl Med Mol Imaging 2005, 32: 757–63. 10.1007/s00259-005-1771-6PubMedView ArticleGoogle Scholar
- Jain KA, Friedman DL, Pettinger TW, Alagappan R, Jeffrey RB Jr, Sommer FG: Adnexal masses: comparison of specificity of endovaginal US and pelvic MR imaging. Radiology 1993, 186: 697–704.PubMedView ArticleGoogle Scholar
- Buy JN, Ghossain MA, Hugol D, Hassen K, Sciot C, Truc JB, Poitout P, Vadrot D: Characterization of adnexal masses: combination of color Doppler and conventional sonography compared with spectral Doppler analysis alone and conventional sonography alone. AJR Am J Roentgenol 1996, 166: 385–93.PubMedView ArticleGoogle Scholar
- Kinkel K, Hricak H, Lu Y, Tsuda K, Filly RA: US characterization of ovarian masses: a meta-analysis. Radiology 2000, 217: 803–11.PubMedView ArticleGoogle Scholar
- Outwater EK, Dunton CJ: Imaging of the ovary and adnexa: clinical issues and applications of MR imaging. Radiology 1995, 194: 1–18.PubMedView ArticleGoogle Scholar
- Yamashita Y, Torashima M, Hatanaka Y, Harada M, Higashida Y, Takahashi M, Mizutani H, Tashiro H, Iwamasa J, Miyazaki K: Adnexal masses: accuracy of characterization with transvaginal US and precontrast and postcontrast MR imaging. Radiology 1995, 194: 557–65.PubMedView ArticleGoogle Scholar
- Stevens SK, Hricak H, Stern JL: Ovarian lesions: detection and characterization with gadolinium-enhanced MRI at 1.5 T. Radiology 1991, 181: 481–8.PubMedView ArticleGoogle Scholar
- Stevens SK, Hricak H, Campos Z: Teratomas versus cystic hemorrhagic adnexal lesions: differentiation with proton-selective fat-saturation MR imaging. Radiology 1993, 186: 481–8.PubMedView ArticleGoogle Scholar
- Kawahara K, Yoshida Y, Kurokawa T, Suzuki Y, Nagahara K, Tsuchida T, Okazawa H, Fujibayashi Y, Yonekura Y, Kotsuji F: Evaluation of positron emission tomography with tracer 18-fluorodeoxyglucose in addition to magnetic resonance imaging in the diagnosis of ovarian cancer in selected women after ultrasonography. J Comput Assist Tomogr 2004, 28: 505–16. 10.1097/00004728-200407000-00011PubMedView ArticleGoogle Scholar
- Rieber A, Nussle K, Stohr I, Grab D, Fenchel S, Kreienberg R, Reske SN, Brambs HJ: Preoperative diagnosis of ovarian tumors with MR imaging: comparison with transvaginal sonography, positron emission tomography, and histologic findings. AJR Am J Roentgenol 2001, 177: 123–9.PubMedView ArticleGoogle Scholar
- Fenchel S, Grab D, Nuessle K, Kotzerke J, Rieber A, Kreienberg R, Brambs HJ, Reske SN: Asymptomatic adnexal masses: correlation of FDG PET and histopathologic findings. Radiology 2002, 223: 780–8. 10.1148/radiol.2233001850PubMedView ArticleGoogle Scholar
- Berger KL, Nicholson SA, Dehdashti F, Siegel BA: FDG PET evaluation of mucinous neoplasms: correlation of FDG uptake with histopathologic features. AJR Am J Roentgenol 2000, 174: 1005–8.PubMedView ArticleGoogle Scholar
- Modesitt S, Tortolero-Luna G, Robinson J, Gershenson D, Wolf J: Ovarian and extraovarian endometriosis-associated cancer. Obstet Gynecol 2002, 100: 788. 10.1016/S0029-7844(02)02149-XPubMedView ArticleGoogle Scholar
- Castellucci P, Perrone AM, Picchio M, Ghi T, Farsad M, Nanni C, Messa C, Meriggiola MC, Pelusi G, Al-Nahhas A, Rubello D, Fazio F, Fanti S: Diagnostic accuracy of 18F-FDG PET/CT in characterizing ovarian lesions and staging ovarian cancer: correlation with transvaginal ultrasonography, computed tomography, and histology. Nucl Med Commun 2007, 28: 589–95. 10.1097/MNM.0b013e3281afa256PubMedView ArticleGoogle Scholar
- Kuhn W, Rutke S, Späthe K, Schmalfeldt B, Florack G, von Hundelshausen B, Pachyn D, Ulm K, Graeff H: Neoadjuvant chemotherapy followed by tumor debulking prolongs survival for patients with poor prognosis in International Federation of Gynecology and Obstetrics Stage IIIC ovarian carcinoma. Cancer 2001, 92: 2585–2591. 10.1002/1097-0142(20011115)92:10<2585::AID-CNCR1611>3.0.CO;2-#PubMedView ArticleGoogle Scholar
- Yoshida Y, Kurokawa T, Kawahara K, Tsuchida T, Okazawa H, Fujibayashi Y, Yonekura Y, Kotsuji F: Incremental benefits of FDG positron emission tomography over CT alone for the preoperative staging of ovarian cancer. AJR Am J Roentgenol 2004, 182: 227–33.PubMedView ArticleGoogle Scholar
- Kitajima K, Murakami K, Yamasaki E, Kaji Y, Fukasawa I, Inaba N, Sugimura K: Diagnostic accuracy of integrated FDG-PET/contrast-enhanced CT in staging ovarian cancer: comparison with enhanced CT. Eur J Nucl Med Mol Imaging 2008, 35: 1912–20. 10.1007/s00259-008-0890-2PubMedView ArticleGoogle Scholar
- Schröder W, Zimny M, Rudlowski C, Büll U, Rath W: The role of 18F-fluoro-deoxyglucose positron emission tomography (18F-FDG PET) in diagnosis of ovarian cancer. Int J Gynecol Cancer 1999, 9: 117–122. 10.1046/j.1525-1438.1999.09903.xPubMedView ArticleGoogle Scholar
- Risum S, Høgdall C, Loft A, Berthelsen AK, Høgdall E, Nedergaard L, Lundvall L, Engelholm SA: The diagnostic value of PET/CT for primary ovarian cancer – a prospective study. Gynecol Oncol 2007, 105: 145–9. 10.1016/j.ygyno.2006.11.022PubMedView ArticleGoogle Scholar
- Risum S, Høgdall C, Loft A, Berthelsen AK, Høgdall E, Nedergaard L, Lundvall L, Engelholm SA: Prediction of suboptimal primary cytoreduction in primary ovarian cancer with combined positron emission tomography/computed tomography-a prospective study. Gynecol Oncol 2008, 108: 265–70. 10.1016/j.ygyno.2007.11.002PubMedView ArticleGoogle Scholar
- Kurokawa T, Yoshida Y, Kawahara K, Tsuchida T, Fujibayashi Y, Yonekura Y, Kotsuji F: Whole-body PET with FDG is useful for following up an ovarian cancer patient with only rising CA-125 levels within the normal range. Ann Nucl Med 2002, 16: 491–3. 10.1007/BF02988649PubMedView ArticleGoogle Scholar
- Havrilesky LJ, Kulasingam SL, Matchar DB, Myers ER: FDG-PET for management of cervical and ovarian cancer. Gynecol Oncol 2005, 97: 183–91. 10.1016/j.ygyno.2004.12.007PubMedView ArticleGoogle Scholar
- Makhija S, Howden N, Edwards R, Kelley J, Townsend DW, Meltzer CC: Positron emission tomography/computed tomography imaging for the detection of recurrent ovarian and fallopian tube carcinoma: a retrospective review. Gynecol Oncol 2002, 85: 53–8. 10.1006/gyno.2002.6606PubMedView ArticleGoogle Scholar
- Gu P, Pan LL, Wu SQ, Sun L, Huang G: CA 125, PET alone, PET-CT, CT and MRI in diagnosing recurrent ovarian carcinoma A systematic review and meta-analysis. Eur J Radiol 2008, 29.Google Scholar
- Kitajima K, Murakami K, Yamasaki E, Domeki Y, Kaji Y, Fukasawa I, Inaba N, Suganuma N, Sugimura K: Performance of integrated FDG-PET/contrast-enhanced CT in the diagnosis of recurrent ovarian cancer: comparison with integrated FDG-PET/non-contrast-enhanced CT and enhanced CT. Eur J Nucl Med Mol Imaging 2008, 35: 1439–48. 10.1007/s00259-008-0776-3PubMedView ArticleGoogle Scholar
- Nahmias C, Wahl LM: Reproducibility of standardized uptake value measurements determined by 18F-FDG PET in malignant tumors. J Nucl Med 2008, 49: 1804–8. 10.2967/jnumed.108.054239PubMedView ArticleGoogle Scholar
- Kurokawa T, Yoshida Y, Kawahara K, Tsuchida T, Okazawa H, Fujibayashi Y, Yonekura Y, Kotsuji F: Expression of GLUT-1 glucose transfer, cellular proliferation activity and grade of tumor correlate with [F-18]-fluorodeoxyglucose uptake by positron emission tomography in epithelial tumors of the ovary. Int J Cancer 2004, 10;109: 926–32. 10.1002/ijc.20057View ArticleGoogle Scholar
- Malkasian GD Jr, Melton LJ Jr, O'Brien PC, Greene MH: Prognostic significance of histologic classification and grading of epithelial malignancies of the ovary. Am J Obstet Gynecol 1984, 149: 274–84.PubMedView ArticleGoogle Scholar
- Omura GA, Brady MF, Homesley HD, Yordan E, Major FJ, Buchsbaum HJ, Park RC: Long-term follow-up and prognostic factor analysis in advanced ovarian carcinoma: the Gynecologic Oncology Group experience. J Clin Oncol 1991, 9: 1138–50.PubMedGoogle Scholar
- Shimizu Y, Kamoi S, Amada S, Akiyama F, Silverberg SG: Toward the development of a universal grading system for ovarian epithelial carcinoma: testing of a proposed system in a series of 461 patients with uniform treatment and follow-up. Cancer 1998, 82: 893–901. 10.1002/(SICI)1097-0142(19980301)82:5<893::AID-CNCR14>3.0.CO;2-WPubMedView ArticleGoogle Scholar
- Huettner PC, Weinberg DS, Lage JM: Assessment of proliferative activity in ovarian neoplasms by flow and static cytometry. Correlation with prognostic features. Am J Pathol 1992, 141: 699–706.PubMed CentralPubMedGoogle Scholar
- Garzetti GG, Ciavattini A, Goteri G, De Nictolis M, Stramazzotti D, Lucarini G, Biagini G: Ki67 antigen immunostaining (MIB 1 monoclonal antibody) in serous ovarian tumors: index of proliferative activity with prognostic significance. Gynecol Oncol 1995, 56: 169–74. 10.1006/gyno.1995.1026PubMedView ArticleGoogle Scholar
- Viale G, Maisonneuve P, Bonoldi E, Di Bacco A, Bevilacqua P, Panizzoni GA, Radaelli U, Gasparini G: The combined evaluation of p53 accumulation and of Ki-67 (MIB1) labelling index provides independent information on overall survival of ovarian carcinoma patients. Ann Oncol 1997, 8: 469–76. 10.1023/A:1008253429700PubMedView ArticleGoogle Scholar
- Kalir T, Wang BY, Goldfischer M, Haber RS, Reder I, Demopoulos R, Cohen CJ, Burstein DE: Immunohistochemical staining of GLUT1 in benign, borderline, and malignant ovarian epithelia. Cancer 2002, 94: 1078–82. 10.1002/cncr.10280PubMedView ArticleGoogle Scholar
- Cantuaria G, Magalhaes A, Penalver M, Angioli R, Braunschweiger P, Gomez-Marin O, Kanhoush R, Gomez-Fernandez C, Nadji M: Expression of GLUT-1 glucose transporter in borderline and malignant epithelial tumors of the ovary. Gynecol Oncol 2000, 79: 33–7. 10.1006/gyno.2000.5910PubMedView ArticleGoogle Scholar
- Avril N, Sassen S, Schmalfeldt B, Naehrig J, Rutke S, Weber WA, Werner M, Graeff H, Schwaiger M, Kuhn W: Prediction of response to neoadjuvant chemotherapy by sequential F-18-fluorodeoxyglucose positron emission tomography in patients with advanced-stage ovarian cancer. J Clin Oncol 2005, 23: 7445–53. 10.1200/JCO.2005.06.965PubMedView ArticleGoogle Scholar
- Smith GT, Hubner KF, McDonald T, Thie JA: Cost Analysis of FDG PET for Managing Patients with Ovarian Cancer. Clin Positron Imaging 1999, 2: 63–70. 10.1016/S1095-0397(99)00013-8PubMedView ArticleGoogle Scholar
- Kim S, Chung JK, Kang SB, Kim MH, Jeong JM, Lee DS, Lee MC: [18F]FDG PET as a substitute for second-look laparotomy in patients with advanced ovarian carcinoma. Eur J Nucl Med Mol Imaging 2004, 31: 196–201. 10.1007/s00259-003-1367-yPubMedView ArticleGoogle Scholar
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