CA-125 Correlates with Metastatic Status at [18F]FDG PET/CT in Patients with Relapsed Ovarian Cancer
Keywords:
PET, Positron Emission Tomography, Ovarian Cancer, CA-125Abstract
Background: ovarian cancer (OC) relapse can be diagnosed with the evaluation of tumor markers and 18Ffluorodoxyglucose positron emission tomography/computed tomography ([18F]FDG PET/CT) findings. The aim of our study was to assess the correlation between CA-125 and [18F]FDG PET/CT findings in terms of metastatic disease in patients with OC relapse. Material and Methods: 68 PET/CT scans positive for OC relapse were analyzed qualitatively and semiquantitatively by measuring the maximum and mean standardized uptake value body weight max (SUVmax, SUVmean), SUV lean body mass (SUVlbm), SUV body surface area (SUVbsa), metabolic tumor volume (MTV) and total lesion glycolysis (TLG) of hypermetabolic lesions. These parameters and CA-125 were correlated with the metastatic status of patients. Results: correlation of presence of distant metastases with MTV (p value <0.001), TLG (p value <0.001) and CA-125 (p value 0.010) were reported; no correlation with SUVmax, SUVmean, SUVlbm and SUVbsa were underlined. Moreover, correlation between the type of distant metastases (nodal or extranodal) with MTV (p value 0.021), TLG (p value 0.044) and CA-125 (p value 0.037) were underlined; no correlation with SUVmax, SUVmean, SUVlbm and SUVbsa were reported. Receiving operating characteristic (ROC) curve analysis revealed acceptable performances in both cases. Conclusions: Correlation between volumetric [18F]FDG PET/CT parameters and CA-125 with the metastatic status was reported.
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