M. González-Forero, E. Prieto, I. Domínguez, C. Vigil, I. Peñuelas, J. Arbizu
{"title":"Dual time point 18F-FDOPA PET as a tool for characterizing brain tumors","authors":"M. González-Forero, E. Prieto, I. Domínguez, C. Vigil, I. Peñuelas, J. Arbizu","doi":"10.1016/S1578-200X(11)70012-2","DOIUrl":null,"url":null,"abstract":"<div><p><sup>18</sup>F-FDOPA is an amino acid analogue used to evaluate presynaptic dopaminergic activity, which has aroused great interest in neuro-oncology. We have evaluated five <sup>18</sup>F-FDOPA PET studies of patients referred for study of parkinsonian syndrome. Two subjects had previously treated high- grade brain tumors, one nonspecific brain injury, and 2 subjects presented unexpected tumoral lesions. For all lesions SUVmax, time to SUVmax and tumor-to-normal grey matter SUVmax rate (T/N) were calculated, and 90 minutes <sup>18</sup>F-FDOPA kinetics were analyzed. Tumor lesions corresponded to three malignant neurocytomas, one meningioma, one pineocytoma and one intrasinusal heman- gioma. Both malignant and benign tumors exhibited high uptake of <sup>18</sup>F-FDOPA well above the normal cortex. However, the analysis of the curve uptake displayed characteristic patterns that facilitate the characterization of tumor lesions. A dual phase maximum uptake was observed, with an early 10 minutes uptake in malignant lesions, and a late 60 to 90 minutes uptake in benign or low grade lesions.</p></div>","PeriodicalId":101111,"journal":{"name":"Revista Espa?ola de Medicina Nuclear (English Edition)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2011-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1578-200X(11)70012-2","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Revista Espa?ola de Medicina Nuclear (English Edition)","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1578200X11700122","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
Abstract
18F-FDOPA is an amino acid analogue used to evaluate presynaptic dopaminergic activity, which has aroused great interest in neuro-oncology. We have evaluated five 18F-FDOPA PET studies of patients referred for study of parkinsonian syndrome. Two subjects had previously treated high- grade brain tumors, one nonspecific brain injury, and 2 subjects presented unexpected tumoral lesions. For all lesions SUVmax, time to SUVmax and tumor-to-normal grey matter SUVmax rate (T/N) were calculated, and 90 minutes 18F-FDOPA kinetics were analyzed. Tumor lesions corresponded to three malignant neurocytomas, one meningioma, one pineocytoma and one intrasinusal heman- gioma. Both malignant and benign tumors exhibited high uptake of 18F-FDOPA well above the normal cortex. However, the analysis of the curve uptake displayed characteristic patterns that facilitate the characterization of tumor lesions. A dual phase maximum uptake was observed, with an early 10 minutes uptake in malignant lesions, and a late 60 to 90 minutes uptake in benign or low grade lesions.