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Sachpekidis C, Pan L, Groezinger M, Strauss DS, Dimitrakopoulou-Strauss A. Combined whole-body dynamic and static PET/CT with low-dose [ 18F]PSMA-1007 in prostate cancer patients. Eur J Nucl Med Mol Imaging 2024; 51:2137-2150. [PMID: 38286936 PMCID: PMC11139746 DOI: 10.1007/s00259-024-06620-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 01/17/2024] [Indexed: 01/31/2024]
Abstract
AIM In addition to significant improvements in sensitivity and image quality, the recent introduction of long axial field-of-view (LAFOV) PET/CT scanners has enabled dynamic whole-body imaging for the first time. We aim herein to determine an appropriate acquisition time range for static low-dose [18F]PSMA-1007 PET imaging and to investigate the whole-body pharmacokinetics of [18F]PSMA-1007 by dynamic PET with the LAFOV Biograph Vision Quadra PET/CT in a group of prostate cancer patients. METHODOLOGY In total, 38 prostate cancer patients were enrolled in the analysis for staging or re-staging purposes. Thirty-four patients underwent dynamic whole-body PET/CT (60 min) followed by static whole-body PET/CT and four patients underwent static whole-body PET/CT only. The activity applied was 2 MBq/kg [18F]PSMA-1007. The static PET images of 10-min duration (PET-10) were reconstructed and further split into 8-min (PET-8), 6-min (PET-6), 5-min (PET-5), 4-min (PET-4), and 2-min (PET-2) duration groups. Comparisons were made between the different reconstructed scan times in terms of lesion detection rate and image quality based on SUV calculations of tumor lesions and the spleen, which served as background. Analysis of the dynamic PET/CT data was based on a two-tissue compartment model using an image-derived input function obtained from the descending aorta. RESULTS Analysis of lesion detection rate showed no significant differences when reducing PET acquisitions from 10 up to 5 min. In particular, a total of 169 lesions were counted with PET-10, and the corresponding lesion detection rates (95% CI for the 90% quantile of the differences in tumor lesions) for shorter acquisitions were 100% (169/169) for PET-8 (95% CI: 0-0), 98.8% (167/169) for PET-6 (95% CI: 0-1), 95.9% (162/169) for PET-5 (95% CI: 0-3), 91.7% (155/169) for PET-4 (95% CI: 1-2), and 85.2% (144/169) for PET-2 (95% CI: 1-6). With the exception of PET-2, the differences observed between PET-10 and the other shorter acquisition protocols would have no impact on any patient in terms of clinical management. Objective evaluation of PET/CT image quality showed no significant decrease in tumor-to-background ratio (TBR) with shorter acquisition times, despite a gradual decrease in signal-to-noise ratio (SNR) in the spleen. Whole-body quantitative [18F]PSMA-1007 pharmacokinetic analysis acquired with full dynamic PET scanning was feasible in all patients. Two-tissue compartment modeling revealed significantly higher values for the parameter k3 in tumor lesions and parotid gland compared to liver and spleen, reflecting a higher specific tracer binding to the PSMA molecule and internalization rate in these tissues, a finding also supported by the respective time-activity curves. Furthermore, correlation analysis demonstrated a significantly strong positive correlation (r = 0.72) between SUV and k3 in tumor lesions. CONCLUSIONS In prostate cancer, low-dose (2 MBq/kg) [18F]PSMA-1007 LAFOV PET/CT can reduce static scan time by 50% without significantly compromising lesion detection rate and objective image quality. In addition, dynamic PET can elucidate molecular pathways related to the physiology of [18F]PSMA-1007 in both tumor lesions and normal organs at the whole-body level. These findings unfold many of the potentials of the new LAFOV PET/CT technology in the field of PSMA-based diagnosis and theranostics of prostate cancer.
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Affiliation(s)
- Christos Sachpekidis
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69210, Heidelberg, Germany.
| | - Leyun Pan
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69210, Heidelberg, Germany
| | - Martin Groezinger
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69210, Heidelberg, Germany
- Division of Radiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dimitrios Stefanos Strauss
- Department of Diagnostic and Interventional Radiology (DIR), Heidelberg University Hospital, Heidelberg, Germany
| | - Antonia Dimitrakopoulou-Strauss
- Clinical Cooperation Unit Nuclear Medicine, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, D-69210, Heidelberg, Germany
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Zhao R, Ke M, Lv J, Liu S, Liu Y, Zhang J, Xu L, Gu D, Li M, Cai C, Liu Y, Zeng G, Alexoff D, Ploessl K, Zhu L, Kung HF, Wang X. First-in-human study of PSMA-targeting agent, [ 18F]AlF-P16-093: dosimetry and initial evaluation in prostate cancer patients. Eur J Nucl Med Mol Imaging 2024; 51:1753-1762. [PMID: 38212531 DOI: 10.1007/s00259-024-06596-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/01/2024] [Indexed: 01/13/2024]
Abstract
PURPOSE This is a first-in-human study to evaluate the radiation dosimetry of a new prostate-specific membrane antigen (PSMA)-targeted radiopharmaceutical, [18F]AlF-P16-093, and also initial investigation of its ability to detect PSMA-positive tumors using PET scans in a cohort of prostate cancer (PCa) patients. METHODS The [18F]AlF-P16-093 was automatically synthesized with a GE TRACERlab. A total of 23 patients with histopathologically proven PCa were prospectively enrolled. Dosimetry and biodistribution study investigations were carried out on a subset of six (6) PCa patients, involving multiple time-point scanning. The mean absorbed doses were estimated with PMOD and OLINDA software. RESULTS [18F]AlF-P16-093 was successfully synthesized, and radiochemical purity was > 95%, and average labeling yield was 36.5 ± 8.3% (decay correction, n = 12). The highest tracer uptake was observed in the kidneys, spleen, and liver, contributing to an effective dose of 16.8 ± 1.3 μSv/MBq, which was ~ 30% lower than that of [68Ga]Ga-P16-093. All subjects tolerated the PET examination well, and no reportable side-effects were observed. The PSMA-positive tumors displayed rapid uptake, and they were all detectable within 10 min, and no additional lesions were observed in the following multi-time points scanning. Each patient had at least one detectable tumor lesion, and a total of 356 tumor lesions were observed, including intraprostatic, lymph node metastases, bone metastases, and other soft tissue metastases. CONCLUSIONS We report herein a streamlined method for high yield synthesis of [18F]AlF-P16-093. Preliminary study in PCa patients has demonstrated its safety and acceptable radiation dosimetry. The initial diagnostic study indicated that [18F]AlF-P16-093 PET/CT is efficacious and potentially useful for a widespread application in the diagnosis of PCa patients.
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Affiliation(s)
- Ruiyue Zhao
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Miao Ke
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Jie Lv
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Shaoyu Liu
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Yuheng Liu
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Jing Zhang
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Lifu Xu
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China
| | - Di Gu
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510230, Guangdong, China
| | - Mingzhao Li
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510230, Guangdong, China
| | - Chao Cai
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510230, Guangdong, China
| | - Yongda Liu
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510230, Guangdong, China
| | - Guohua Zeng
- Department of Urology and Guangdong Key Laboratory of Urology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510230, Guangdong, China
| | - David Alexoff
- Five Eleven Pharma Inc, 3700 Market St, Philadelphia, PA, 19104, USA
| | - Karl Ploessl
- Five Eleven Pharma Inc, 3700 Market St, Philadelphia, PA, 19104, USA
| | - Lin Zhu
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China.
- College of Chemistry, Beijing Normal University, Beijing, 100875, China.
| | - Hank F Kung
- Five Eleven Pharma Inc, 3700 Market St, Philadelphia, PA, 19104, USA.
- Department of Radiology, University of Pennsylvania, Philadelphia, PA, 19104, USA.
| | - Xinlu Wang
- Department of Nuclear Medicine, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, Guangdong, China.
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Caracciolo M, Castello A, Lopci E. PSMA PET/CT Versus mpMRI for the Detection of Clinically Significant Prostate Cancer: An Updated Overview. Semin Nucl Med 2024; 54:30-38. [PMID: 37951766 DOI: 10.1053/j.semnuclmed.2023.10.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
In the last years, PSMA-PET imaging and multiparametric MRI (mpMRI) have improved the clinical management of prostate cancer (PCa) patients. Currently, mpMRI is recommended by the EAU (European Association of Urology) guidelines for the primary diagnosis of PCa, whereas PSMA-PET is reserved for disease staging, particularly in high risk localized or locally advanced disease, as well as for biochemical recurrence after surgery. Nevertheless, several studies have explored the added value of PSMA-PET in other clinical scenarios, including primary diagnosis and especially for the detection of clinically significant PCa (csPCa). In the present contribution, we will provide an overview and an update on the current literature on imaging detection of csPCa, with a particular focus on mpMRI, PSMA-PET and their comparison.
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Affiliation(s)
- Matteo Caracciolo
- Nuclear Medicine Unit, Oncological Medical and Specialists Department, University Hospital of Ferrara, Ferrara, Italy
| | - Angelo Castello
- Nuclear Medicine Unit, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Egesta Lopci
- Nuclear Medicine Unit, IRCCS - Humanitas Research Hospital, Rozzano, Milan, Italy.
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Luining WI, Hagens MJ, Meijer D, Ringia JB, de Weijer T, Bektas HO, Ettema RH, Knol RJ, Roeleveld TA, Srbljin S, Weltings S, Koppes JC, van Moorselaar RJ, van Leeuwen PJ, Oprea-Lager DE, Vis AN. The Probability of Metastases Within Different Prostate-specific Antigen Ranges Using Prostate-specific Membrane Antigen Positron Emission Tomography in Patients with Newly Diagnosed Prostate Cancer. EUR UROL SUPPL 2024; 59:55-62. [PMID: 38298765 PMCID: PMC10829602 DOI: 10.1016/j.euros.2023.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/03/2023] [Indexed: 02/02/2024] Open
Abstract
Background and objectives The association between prostate-specific antigen (PSA) level and probability of metastatic disease on prostate-specific membrane antigen (PSMA) positron emission tomography/computed tomography (PET/CT) has not yet been established in patients with newly diagnosed prostate cancer (PCa). Our objective was to assess the probability of metastatic disease within different PSA ranges using PSMA PET/CT for initial staging of PCa, and to identify both the anatomical distribution and the predictors of metastases on PSMA PET/CT. Methods In total, 2193 patients with newly diagnosed PCa were retrospectively studied. PSMA PET/CT was performed for staging purposes between January 2017 and May 2022. The proportion of patients with PSMA-avid metastases, stratified by PSA level, was studied. A vast majority of patients in whom at least one high-risk prognostic factor was present underwent PSMA PET/CT. A multivariable logistic regression analysis was performed to identify the predictors of metastases on PSMA PET/CT using clinical, biochemical, radiological, and pathological variables. Key findings and limitations The median PSA level at PSMA PET/CT was 14.1 ng/ml. Any metastatic disease (miN1-M1a-c) was observed in 34.7% (763/2193) of all patients and distant metastases (miM1a-c) in 25.4% (557/2193) of patients. The presence of any metastatic disease increased with PSA levels, being 15.4% in men with PSA levels <10 ng/ml and 87.5% in men with PSA levels >100 ng/ml. The multivariable logistic regression analysis found significant associations between the presence of any metastatic disease and PSA subgroups, clinical tumor stage ≥T2, grade group >3, and radiological tumor stage ≥T3b. Conclusions and clinical implications This is the first large epidemiological study in patients with PCa demonstrating the association between PSA subgroups and metastatic disease on modern imaging PSMA PET/CT. Data from this study can be used to counsel patients on the probability of metastatic disease at the time of PSA screening and to provide guidance on existing guidelines. Patient summary The prostate-specific antigen level could be used to assess the risk of metastases on prostate-specific membrane antigen positron (PSMA) emission tomography/computed tomography (PET/CT). This knowledge is valuable for selecting patients who will benefit most from metastatic screening with PSMA PET/CT.
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Affiliation(s)
- Wietske I. Luining
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
| | - Marinus J. Hagens
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - Dennie Meijer
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
| | - Joanneke B. Ringia
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - Tessa de Weijer
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Huseyyin O. Bektas
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
| | - Rosemarijn H. Ettema
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
| | - Remco J.J. Knol
- Department of Nuclear Medicine, Noordwest Hospital, Alkmaar, The Netherlands
| | - Ton A. Roeleveld
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
- Department Urology, Noordwest Hospital, Alkmaar, The Netherlands
| | - Sandra Srbljin
- Department of Nuclear Medicine, Zaans Medical Center, Zaandam, The Netherlands
| | - Saskia Weltings
- Department of Urology, Zaans Medical Center, Zaandam, The Netherlands
| | - Jose C.C. Koppes
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - Reindert J.A. van Moorselaar
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
| | - Pim J. van Leeuwen
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - Daniela E. Oprea-Lager
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Cancer Center Amsterdam, Amsterdam, The Netherlands
| | - André N. Vis
- Department of Urology, Amsterdam University Medical Centers, Amsterdam, The Netherlands
- Prostate Cancer Network the Netherlands, Amsterdam, The Netherlands
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Bouchelouche K, Sathekge MM. Letter From the Editors. Semin Nucl Med 2024; 54:1-3. [PMID: 38065626 DOI: 10.1053/j.semnuclmed.2023.11.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
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Tayara OM, Pełka K, Kunikowska J, Malewski W, Sklinda K, Kamecki H, Poletajew S, Kryst P, Nyk Ł. Comparison of Multiparametric MRI, [ 68Ga]Ga-PSMA-11 PET-CT, and Clinical Nomograms for Primary T and N Staging of Intermediate-to-High-Risk Prostate Cancer. Cancers (Basel) 2023; 15:5838. [PMID: 38136382 PMCID: PMC10741730 DOI: 10.3390/cancers15245838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/26/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
PURPOSE OF THE REPORT Although multiparametric magnetic resonance imaging (mpMRI) is commonly used for the primary staging of prostate cancer, it may miss non-enlarged metastatic lymph nodes. Positron emission tomography-computed tomography targeting the prostate-specific membrane antigen (PSMA PET-CT) is a promising method to detect non-enlarged metastatic lymph nodes, but more data are needed. MATERIALS AND METHODS In this single-center, prospective study, we enrolled patients with intermediate-to-high-risk prostate cancer scheduled for radical prostatectomy with pelvic node dissection. Before surgery, prostate imaging with mpMRI and PSMA PET-CT was used to assess lymph node involvement (LNI), extra-prostatic extension (EPE), and seminal vesicle involvement (SVI). Additionally, we used clinical nomograms to estimate the risk of these three outcomes. RESULTS Of the 74 patients included, 61 (82%) had high-risk prostate cancer, and the rest had intermediate-risk cancer. Histopathology revealed LNI in 20 (27%) patients, SVI in 26 (35%), and EPE in 52 (70%). PSMA PET-CT performed better than mpMRI at detecting LNI (area under the curve (AUC, 95% confidence interval): 0.779 (0.665-0.893) vs. 0.655 (0.529-0.780)), but mpMRI was better at detecting SVI (AUC: 0.775 (0.672-0.878) vs. 0.585 (0.473-0.698)). The MSKCC nomogram performed well at detecting both LNI (AUC: 0.799 (0.680-0.918)) and SVI (0.772 (0.659-0.885)). However, when the nomogram was used to derive binary diagnoses, decision curve analyses showed that the MSKCC nomogram provided less net benefit than mpMRI and PSMA PET-CT for detecting SVI and LNI, respectively. CONCLUSIONS mpMRI and [68Ga]Ga-PSMA-11 PET-CT are complementary techniques to be used in conjunction for the primary T and N staging of prostate cancer.
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Affiliation(s)
- Omar Marek Tayara
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
| | - Kacper Pełka
- Department of Nuclear Medicine, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.P.); (J.K.)
- Department of Methodology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Jolanta Kunikowska
- Department of Nuclear Medicine, Medical University of Warsaw, 02-097 Warsaw, Poland; (K.P.); (J.K.)
| | - Wojciech Malewski
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
| | - Katarzyna Sklinda
- Department of Radiology, Centre of Postgraduate Medical Education, 01-809 Warsaw, Poland
- Diagnostic Radiology Department, Central Clinical Hospital of the Ministry of the Interior in Warsaw, 02-507 Warsaw, Poland
| | - Hubert Kamecki
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
| | - Sławomir Poletajew
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
| | - Piotr Kryst
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
| | - Łukasz Nyk
- Second Department of Urology, Centre of Postgraduate Medical Education, 01-813 Warsaw, Poland; (W.M.); (S.P.); (P.K.); (Ł.N.)
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Urso L, Filippi L, Castello A, Marzola MC, Bartolomei M, Cittanti C, Florimonte L, Castellani M, Zucali P, Bruni A, Sabbatini R, Dominici M, Panareo S, Evangelista L. PSMA PET/CT in Castration-Resistant Prostate Cancer: Myth or Reality? J Clin Med 2023; 12:7130. [PMID: 38002742 PMCID: PMC10672135 DOI: 10.3390/jcm12227130] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 10/25/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
BACKGROUND prostate-specific membrane antigen (PSMA) ligand PET has been recently incorporated into international guidelines for several different indications in prostate cancer (PCa) patients. However, there are still some open questions regarding the role of PSMA ligand PET in castration-resistant prostate cancer (CRPC). The aim of this work is to assess the clinical value of PSMA ligand PET/CT in patients with CRPC. RESULTS PSMA ligand PET has demonstrated higher detection rates in comparison to conventional imaging and allows for a significant reduction in the number of M0 CRPC patients. However, its real impact on patients' prognosis is still an open question. Moreover, in CRPC patients, PSMA ligand PET presents some sensitivity and specificity limitations. Due to its heterogeneity, CRPC may present a mosaic of neoplastic clones, some of which could be PSMA-/FDG+, or vice versa. Likewise, unspecific bone uptake (UBU) and second primary neoplasms (SNPs) overexpressing PSMA in the neoangiogenic vessels represent potential specificity issues. Integrated multi-tracer imaging (PSMA ligand and [18F]FDG PET) together with a multidisciplinary discussion could allow for reaching the most accurate evaluation of each patient from a precision medicine point of view.
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Affiliation(s)
- Luca Urso
- Department of Nuclear Medicine—PET/CT Center, S. Maria della Misericordia Hospital, 45100 Rovigo, Italy; (L.U.); (M.C.M.)
| | - Luca Filippi
- Nuclear Medicine Unit, Department of Oncohaematology, Fondazione PTV, Policlinico Tor Vergata University Hospital, Viale Oxford 81, 00133 Rome, Italy;
| | - Angelo Castello
- Nuclear Medicine Unit, Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy; (L.F.); (M.C.)
| | - Maria Cristina Marzola
- Department of Nuclear Medicine—PET/CT Center, S. Maria della Misericordia Hospital, 45100 Rovigo, Italy; (L.U.); (M.C.M.)
| | - Mirco Bartolomei
- Nuclear Medicine Unit, Onco-Hematological Department, University Hospital of Ferrara, 44124 Ferrara, Italy; (M.B.); (C.C.)
| | - Corrado Cittanti
- Nuclear Medicine Unit, Onco-Hematological Department, University Hospital of Ferrara, 44124 Ferrara, Italy; (M.B.); (C.C.)
- Department of Translational Medicine, University of Ferrara, 44121 Ferrara, Italy
| | - Luigia Florimonte
- Nuclear Medicine Unit, Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy; (L.F.); (M.C.)
| | - Massimo Castellani
- Nuclear Medicine Unit, Fondazione IRCCS Ca’ Granda, Ospedale Maggiore Policlinico, 20122 Milan, Italy; (L.F.); (M.C.)
| | - Paolo Zucali
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Milan, Italy; (P.Z.); (L.E.)
- Department of Oncology, IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
| | - Alessio Bruni
- Radiotherapy Unit, Department of Oncology and Hematology, University Hospital of Modena, 41124 Modena, Italy;
| | - Roberto Sabbatini
- Oncology Unit, Department of Oncology and Hematology, University Hospital of Modena, Via del Pozzo 71, 41124 Modena, Italy; (R.S.); (M.D.)
| | - Massimo Dominici
- Oncology Unit, Department of Oncology and Hematology, University Hospital of Modena, Via del Pozzo 71, 41124 Modena, Italy; (R.S.); (M.D.)
| | - Stefano Panareo
- Nuclear Medicine Unit, Department of Oncology and Hematology, University Hospital of Modena, Via del Pozzo 71, 41124 Modena, Italy;
| | - Laura Evangelista
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Milan, Italy; (P.Z.); (L.E.)
- Nuclear Medicine Unit, IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy
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