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Jaswal A, Hazari PP, Prakash S, Sethi P, Kaushik A, Roy BG, Kathait S, Singh B, Mishra AK. [ 99mTc]Tc-DTPA-Bis(cholineethylamine) as an Oncologic Tracer for the Detection of Choline Transporter (ChT) and Choline Kinase (ChK) Expression in Cancer. ACS OMEGA 2022; 7:12509-12523. [PMID: 35474820 PMCID: PMC9025991 DOI: 10.1021/acsomega.1c04256] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 03/08/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVE The elevated choline transporters (ChT), choline kinase (ChK), choline uptake, and phosphorylation in certain tumor cells have influenced the development of radiolabeled choline derivatives as diagnostic probes for imaging cell membrane proliferation. We, therefore, aimed to develop a choline-based moiety for imaging choline kinase-overexpressed tumors by single-photon emission tomography (SPECT). A novel choline-based diagnostic probe was synthesized and evaluated preclinically in various ChT- and ChK-overexpressed tumor models for SPECT imaging applications. METHODS The synthesis of diethylenetriaminepentaacetic acid-bis-choline ethylamine [DTPA-bis(ChoEA)] featured the conjugation of dimethylaminoethanol to a bifunctional chelator DTPA anhydride. [99mTc]Tc-DTPA-bis(ChoEA) was prepared, and its in vivo characteristics were evaluated in BALB/c mice and tumor-xenografted PC3, A549, and HCT116 athymic mouse models. The in vitro parameters, including cell binding and cytotoxicity, were assessed in PC3, A549, and HCT116 cell lines. To evaluate the specificity of the radioprobe, competitive binding studies were performed. Small-animal SPECT/CT diagnostic imaging was performed for in vivo evaluation. The mouse biodistribution data was further investigated to estimate the radiation dose in humans. RESULTS In silico studies suggested high binding with enhanced specificity. A standard radiolabeling procedure using stannous chloride as a reducing agent showed a labeling yield of 99.5 ± 0.5%. The in silico studies suggested high binding with enhanced specificity. [99mTc]Tc-DTPA-bis(ChoEA) showed high in vitro stability and specificity. The pharmacokinetic studies of [99mTc]Tc-DTPA-bis(ChoEA) in mice showed an increased tumor-to-background ratio after few minutes of intravenous administration. The first-in-human trial was also conducted. The effective dose was estimated to be 0.00467 mSv/MBq (4.67 mSv/GBq), resulting in a radiation dose of up to 1.73 mSv for the 370 MBq injection of [99mTc]Tc-DTPA-bis(ChoEA). CONCLUSIONS The synthesized radioprobe [99mTc]Tc-DTPA-bis(ChoEA) accumulates specifically in choline kinase-overexpressed tumors with a high signal-to-noise ratio. The preclinical and first-in-man data suggested that [99mTc]Tc-DTPA-bis(ChoEA) could potentially be used as a diagnostic SPECT tracer in the monitoring and staging of cancer.
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Affiliation(s)
- Ambika
Parmar Jaswal
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Puja Panwar Hazari
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Surbhi Prakash
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Pallavi Sethi
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Aruna Kaushik
- Department
of Nuclear Medicine, Institute of Nuclear
Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Bal G. Roy
- Experimental
Animal Facility, Institute of Nuclear Medicine
and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Swati Kathait
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
| | - Baljinder Singh
- Post
Graduate Institute of Medical Education & Research, Chandigarh 160012, India
| | - Anil Kumar Mishra
- Division
of Cyclotron and Radiopharmaceutical Sciences, Institute of Nuclear Medicine and Allied Sciences, Brig S.K. Mazumdar Road, Delhi 110054, India
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Costello LC, Franklin RB. A comprehensive review of the role of zinc in normal prostate function and metabolism; and its implications in prostate cancer. Arch Biochem Biophys 2016; 611:100-112. [PMID: 27132038 DOI: 10.1016/j.abb.2016.04.014] [Citation(s) in RCA: 134] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2016] [Revised: 04/14/2016] [Accepted: 04/24/2016] [Indexed: 12/22/2022]
Abstract
The human prostate gland contains extremely high zinc levels; which is due to the specialized zinc-accumulating acinar epithelial of the peripheral zone. These cells evolved for their unique capability to produce and secrete extremely levels of citrate, which is achieved by the high cellular zinc level effects on the cell metabolism. This review highlights the specific functional and metabolic alterations that result from the accumulation of the high zinc levels, especially its effects on mitochondrial citrate metabolism and terminal oxidation. The implications of zinc in the development and progression of prostate cancer are described, which is the most consistent hallmark characteristic of prostate cancer. The requirement for decreased zinc resulting from down regulation of ZIP1 to prevent zinc cytotoxicity in the malignant cells is described as an essential early event in prostate oncogenesis. This provides the basis for the concept that an agent (such as the zinc ionophore, clioquinol) that facilitates zinc uptake and accumulation in ZIP1-deficient prostate tumors cells will markedly inhibit tumor growth. In the current absence of an efficacious chemotherapy for advanced prostate cancer, and for prevention of early development of malignancy; a zinc treatment regimen is a plausible approach that should be pursued.
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Affiliation(s)
- Leslie C Costello
- Department of Oncology and Diagnostic Sciences, Dental School/University of Maryland, Baltimore, MD 21201, USA; The University of Maryland Greenebaum Cancer Center, Baltimore, MD 21201, USA.
| | - Renty B Franklin
- Department of Oncology and Diagnostic Sciences, Dental School/University of Maryland, Baltimore, MD 21201, USA; The University of Maryland Greenebaum Cancer Center, Baltimore, MD 21201, USA
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Chipollini J, Punnen S. Salvage Cryoablation of the Prostate. Prostate Cancer 2016. [DOI: 10.1016/b978-0-12-800077-9.00058-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Pitfalls in Interpreting mp-MRI of the Prostate: A Pictorial Review with Pathologic Correlation. Insights Imaging 2015; 6:611-30. [PMID: 26385690 PMCID: PMC4656245 DOI: 10.1007/s13244-015-0426-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 07/23/2015] [Accepted: 07/29/2015] [Indexed: 01/20/2023] Open
Abstract
Objectives The purpose of this pictorial review is to present a wide spectrum of prostate multiparametric MRI (mp-MRI) pitfalls that may occur in clinical practice, with radiological and pathological correlation. Methods All examinations were performed according to ESUR Guidelines protocols. Results and Conclusion mp-MRI imaging of the prostate often leads to interpreting doubts and misdiagnosis due to the many interpretative pitfalls that a tissue, whether healthy or treated, may cause. These “false-positive” findings may occur in each stage of the disease history, from the primary diagnosis and staging, to the post-treatment stage, and whether they are caused by the tissue itself or are iatrogenic, their recognition is critical for proper treatment and management. Knowledge of these known pitfalls and their interpretation in the anatomical-radiological context can help radiologists avoid misdiagnosis and consequently mistreatment. Main Messages • Some physiological changes in the peripheral and central zone may simulate prostate cancer. • Technical errors, such as mispositioned endorectal coils, can affect the mp-MRI interpretation. • Physiological changes post-treatment can simulate recurrence
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Lynch K, O'Brien R. ¹H magnetic resonance spectroscopy: a review of the current literature and its potential utility in veterinary oncology. Vet J 2014; 200:240-7. [PMID: 24662026 DOI: 10.1016/j.tvjl.2014.02.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 02/04/2014] [Accepted: 02/06/2014] [Indexed: 11/15/2022]
Abstract
Advanced imaging of veterinary cancer patients has evolved in recent years and modalities once limited to human medicine have now been described for diagnostic purposes in veterinary medicine (positron emission tomography/computed tomography, single-photon emission computed tomography, whole body magnetic resonance imaging). Magnetic resonance spectroscopy (MRS) is a non-invasive and non-ionizing technique that is well described in the human medical literature and is most frequently used to evaluate the metabolic activity of tissues with questionable malignant transformation. Differentiation of neoplastic tissue from surrounding normal tissue is dependent on variations in cellular metabolism. Positive identification of malignancy can be made when neoplastic alterations are occurring at the cellular level prior to gross anatomic changes. This improved, early detection of cancer occurrence (or recurrence) can improve patient survival and direct medical therapy. MRS techniques are largely underutilized in veterinary medicine, with current research predominantly limited to the brain (both evaluation of normal and diseased tissue). Given the clinical utility of MRS in humans, the technique may also be useful in the staging of cancer in veterinary medicine.
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Affiliation(s)
- Katherine Lynch
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61801, USA.
| | - Robert O'Brien
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61801, USA
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Costello LC, Franklin RB, Zou J, Naslund MJ. Evidence that Human Prostate Cancer is a ZIP1-Deficient Malignancy that could be Effectively Treated with a Zinc Ionophore (Clioquinol) Approach. Chemotherapy 2014; 4. [PMID: 26273543 DOI: 10.4172/2167-7700.1000152] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Despite decades of research, no efficacious chemotherapy exists for the treatment of prostate cancer. Malignant prostate zinc levels are markedly decreased in all cases of prostate cancer compared to normal/benign prostate. ZIP1 zinc transporter down regulation decreases zinc to prevent its cytotoxic effects. Thus, prostate cancer is a "ZIP1-deficient" malignancy. A zinc ionophore (e.g. Clioquinol) treatment to increase malignant zinc levels is a plausible treatment of prostate cancer. However, skepticism within the clinical/biomedical research community impedes significant progress leading to such a zinc treatment. This report reviews the clinical and experimental background, and presents new experimental data showing Clioquinol suppression of prostate malignancy; which provides strong support for a zinc ionophore treatment for prostate cancer. Evaluation of often-raised opposing issues is presented. These considerations lead to the conclusion that the compelling evidence dictates that a zinc-treatment approach for prostate cancer should be pursued with additional research leading to clinical trials.
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Affiliation(s)
- Leslie C Costello
- Department of Oncology and Diagnostic Sciences; Dental School; and The Greenebaum Cancer Center; University of Maryland; Baltimore, USA
| | - Renty B Franklin
- Department of Oncology and Diagnostic Sciences; Dental School; and The Greenebaum Cancer Center; University of Maryland; Baltimore, USA
| | - Jing Zou
- Department of Oncology and Diagnostic Sciences; Dental School; University of Maryland; Baltimore, USA
| | - Michael J Naslund
- Division of Urology, University of Maryland School of Medicine; Baltimore, USA
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Li L, Wang L, Feng Z, Hu Z, Wang G, Yuan X, Wang H, Hu D. Prostate cancer magnetic resonance imaging (MRI): multidisciplinary standpoint. Quant Imaging Med Surg 2013; 3:100-12. [PMID: 23630657 DOI: 10.3978/j.issn.2223-4292.2013.03.03] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 03/12/2013] [Indexed: 12/11/2022]
Abstract
Prostate cancer is the most common cancer diagnosed in men and a leading cause of death. Accurate assessment is a prerequisite for optimal clinical management and therapy selection of prostate cancer. There are several parameters and nomograms to differentiate between patients with clinically insignificant disease and patients in need of treatment. Magnetic resonance imaging (MRI) is a technique which provides more detailed anatomical images due to high spatial resolution, superior contrast resolution, and multiplanar capability. State-of-the-art MRI techniques, such as diffusion weighted imaging (DWI), MR spectroscopic imaging (MRSI), dynamic contrast enhanced MRI (DCE-MRI), improve interpretation of prostate cancer imaging. In this article, we review the major role of MRI in the advanced management of prostate cancer to noninvasively improve tumor staging, biologic potential, treatment planning, therapy response, local recurrence, and to guide target biopsy for clinical suspected cancer with previous negative biopsy. Finally, future challenges and opportunities in prostate cancer management in the area of functional MRI are discussed as well.
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Affiliation(s)
- Liang Li
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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Nagel KNA, Schouten MG, Hambrock T, Litjens GJS, Hoeks CMA, Haken BT, Barentsz JO, Fütterer JJ. Differentiation of Prostatitis and Prostate Cancer by Using Diffusion-weighted MR Imaging and MR-guided Biopsy at 3 T. Radiology 2013; 267:164-172. [DOI: 10.1148/radiol.12111683] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
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Penet MF, Chen Z, Bhujwalla ZM. MRI of metastasis-permissive microenvironments. Future Oncol 2012; 7:1269-84. [PMID: 22044202 DOI: 10.2217/fon.11.114] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
One of the earliest documented observations of the importance of the microenvironment in metastasis was made by Stephen Paget in 1889. More than a century later, the metastatic cascade remains a major cause of mortality from cancer. Cancer meets the criterion of a successful organization that is able to survive by adapting to changing environments. In fact, the tumor microenvironment and stroma are co-opted and shaped by cancer cells to derive a survival advantage. Cohesive strategies integrating advances in molecular biology and chemistry, with noninvasive multimodality imaging, provide new insights into the role of the tumor microenvironment in promoting metastasis from primary tumors as well as insights into environments that attract and permit cancer cells to establish colonies in distant organs. This article provides an overview of molecular and functional imaging characterization of microenvironments that can promote or permit cancer cells to metastasize and the microenvironmental characteristics of distant metastases.
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Affiliation(s)
- Marie-France Penet
- JHU In vivo Cellular & Molecular Imaging Center, The Russell H. Morgan Department of Radiology & Radiological Science, Baltimore, MD, USA.
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Weis J, Jorulf H, Bergman A, Ortiz-Nieto F, Häggman M, Ahlström H. MR spectroscopy of the human prostate using surface coil at 3 T: Metabolite ratios, age-dependent effects, and diagnostic possibilities. J Magn Reson Imaging 2011; 34:1277-84. [DOI: 10.1002/jmri.22746] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Accepted: 07/19/2011] [Indexed: 11/09/2022] Open
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Stasinopoulos I, Penet MF, Krishnamachary B, Bhujwalla ZM. Molecular and functional imaging of invasion and metastasis: windows into the metastatic cascade. Cancer Biomark 2011; 7:173-88. [PMID: 21576811 DOI: 10.3233/cbm-2010-0188] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The ability of cancer cells to invade, metastasize, and form distant colonies, is one of the key characteristics that confers lethality to cancer. Metastatic cancer cells typically become refractory to treatment. The metastatic cascade is a multi-step process that is governed by events within the cancer cell, the tumor microenvironment, and the distant environments that are invaded and colonized by the cancer cells. Noninvasive imaging techniques are facilitating a close examination of the stepwise journey of the cancer cell from the primary tumor to the distant metastatic site. Here we have discussed the metastatic process, and how molecular and functional imaging of cancer are providing new insights into the metastatic cascade that can be exploited for treatment of metastatic disease.
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Affiliation(s)
- Ioannis Stasinopoulos
- JHU ICMIC Program, The Russell H. Morgan Department of Radiology and Radiological Science, USA
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12
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Preliminary results for characterization of pelvic lymph nodes in patients with prostate cancer by diffusion-weighted MR-imaging. Invest Radiol 2010; 45:15-23. [PMID: 19996762 DOI: 10.1097/rli.0b013e3181bbdc2f] [Citation(s) in RCA: 131] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
OBJECTIVES In this retrospective feasibility study diffusion-weighted magnetic resonance imaging (DWI) was evaluated as a potential tool for characterization of pelvic lymph nodes in patients with prostate cancer. METHODS AND MATERIALS Twenty-nine patients with prostate cancer underwent DWI of the pelvis at 1.5T by a non breath-hold SSEPI sequence using a body phased array coil with b values of 50, 300, and 600 s/mm(2) and an additional T2-weighted sequence. A total of 118 lymph nodes (>6 mm short axis) were analyzed by measuring the ADC-value with a polygon region of interest. Feasibility for ADC-measurement was assessed by comparing the ADC-value from the automatically created ADC-map (ADC(MR_unit)) with a manually calculated ACD-value (ADC(calculated)) and by using a linear-regression model for comparison with size and standard deviation of the ADC-value. Diagnostic performance was estimated by receiver operator characteristic analysis using histologic and/or clinical follow-up as standard of reference. RESULTS ADC(MR_unit) and ADC(calculated) showed a high correlation (r = 0.8999) with a mean percentual deviation of 6.33%. There was a highly significant difference between the mean ADC-value (x10(-3) mm(2)/s) of malignant (1.07 +/- 0.23) versus benign (1.54 +/- 0.25) lymph nodes, even in subgroup analysis for lymph nodes smaller versus larger than 10 mm. Receiver operator characteristic-analysis showed a good accuracy of the ADC-value (85.6% [101/118]; sensitivity: 86.0% [43/50]; specificity: 85.3% [53/68]) for differentiation of malignant and benign lymph nodes at a cutoff 1.30 x 10(-3) mm(2)/s. This was superior to a size-based analysis at a cutoff of 8 mm (accuracy: 66.1% [78/118]; sensitivity: 82.0% [41/50]; specificity: 54.4% [37/68]; P < 0.01). CONCLUSIONS DWI has the potential of being an accurate technique for analysis of pelvic lymph nodes. Moreover, our preliminary results suggest that the ADC-value might perform significantly superior to size criteria to discriminate between benign and malignant lymph nodes.
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Magnetic resonance spectroscopy as a decision tool in multimodality treatment design for localised prostate cancer. Oncol Rev 2009. [DOI: 10.1007/s12156-009-0029-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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[(11)C]choline PET/CT in prostate cancer patients with biochemical recurrence after radical prostatectomy. World J Urol 2009; 27:619-25. [PMID: 19234708 DOI: 10.1007/s00345-009-0371-7] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2008] [Accepted: 01/06/2009] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE To evaluate [(11)C]choline positron emission tomography/computed tomography ([(11)C]choline PET/CT) for the detection of a biochemical recurrence of prostate cancer after radical prostatectomy. METHODS Retrospective analysis of [(11)C]choline PET/CT performed in 41 consecutive prostate cancer patients with a rising PSA. The mean time to biochemical relapse was 24 months. PSA levels were determined at time of examination, and patients received either a targeted biopsy or surgery. Histopathology reports served as reference for the evaluation of the [(11)C]choline PET/CT findings. RESULTS Mean PSA in [(11)C]choline PET/CT positive patients was 3.1 ng/ml (median 2.2 ng/ml, range 0.5-11.6 ng/ml) and 0.86 ng/ml in [(11)C]choline PET/CT negative patients (median 0.83 ng/ml, range 0.41-1.40 ng/ml). Six of 12 patients with PSA < 1.5 ng/ml [(11)C]choline PET/CT revealed a pathological uptake. Histopathology was positive in 6/12 patients in this group. At PSA levels ranging from 1.5 to 2.5 ng/ml all [(11)C]choline PET/CT were positive (n = 16), a positive histology was found in 12/16 patients (75%) and at PSA 2.5-5 ng/ml [(11)C]choline PET/CT was positive in 8/8 patients, confirmed by histology in 7/8 patients. Finally, at PSA higher than 5 ng/ml [(11)C]choline PET/CT identified 5/5 patients positive all confirmed by histology. The sensitivity of [(11)C]choline PET/CT for the detection of recurrence at PSA < 2.5 ng/ml was 89% with a positive predictive value of 72%. CONCLUSION [(11)C]choline PET/CT is useful for re-staging of prostate cancer in patients with rising PSA even at levels below 1.5 ng/ml. Our study confirms results from other published studies on [(11)C]choline PET/CT in prostate cancer relapse.
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Kim CK, Park BK, Lee HM. Prediction of locally recurrent prostate cancer after radiation therapy: Incremental value of 3T diffusion-weighted MRI. J Magn Reson Imaging 2009; 29:391-397. [DOI: 10.1002/jmri.21645] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
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Kim CK, Park BK, Park W, Kim SS. Prostate MR imaging at 3T using a phased-arrayed coil in predicting locally recurrent prostate cancer after radiation therapy: preliminary experience. ACTA ACUST UNITED AC 2009; 35:246-52. [PMID: 19130116 DOI: 10.1007/s00261-008-9495-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2008] [Revised: 08/17/2008] [Accepted: 12/09/2008] [Indexed: 12/29/2022]
Abstract
The purpose of this study was to retrospectively assess the diagnostic performance of diffusion-weighted imaging (DWI) and dynamic contrast-enhanced imaging (DCEI) at 3T in predicting locally recurrent prostate cancer after radiation therapy. Twenty-four patients with a rising prostate-specific antigen level after treatment with radiation therapy underwent prostate MR imaging at 3T, followed by transrectal ultrasound-guided biopsy. MRI findings and biopsy results were correlated in six prostate sectors of both peripheral zones. Two radiologists in consensus reviewed the MR images and rated the likelihood of recurrent cancer on a 5-point scale. Out of the 144 prostate sectors, 37 (26%) sectors were positive for cancer in ten patients. For predicting locally recurrent cancer, the sensitivity and specificity of DWI, DCEI, and combined DCEI and DWI were higher than those for T2-weighted imaging (T2WI). The accuracy of DWI, DCEI and combined DCEI and DWI was greater than that of T2WI. A significantly greater Az was determined for combined DCEI and DWI (Az = 0.863, P < 0.05) as compared with T2WI, DCEI, and DWI. For predicting locally recurrent prostate cancer after radiation therapy, our preliminary results suggest that the use of either DWI or DCEI is superior to the use of T2WI.
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Affiliation(s)
- Chan Kyo Kim
- Department of Radiology, Kangwon National University College of Medicine, Chuncheon, Republic of Korea.
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Reply to Emanuele Casciani, Luca Bertini and GianFranco Gualdi's Letter to the Editor re: Alessandro Sciarra, Valeria Panebianco, Stefano Salciccia, et al. Role of Dynamic Contrast-Enhanced Magnetic Resonance (MR) Imaging and Proton MR Spectroscopic Imaging in the Detection of Local Recurrence after Radical Prostatectomy for Prostate Cancer. Eur Urol 2008;54:589–600. Eur Urol 2009. [DOI: 10.1016/j.eururo.2008.06.030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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[Relevance of radiological imaging for lymph node surgery of urological tumors]. Urologe A 2008; 48:12-8. [PMID: 19048223 DOI: 10.1007/s00120-008-1753-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This review illustrates the relevance of computed tomography (CT) and magnetic resonance imaging (MRI) for detecting or excluding lymph node metastases in urological malignancies. Although radiological assessment of lymph node metastases is well established in renal cell and testicular cancer, it is unreliable in prostate, bladder, and penile cancer. MR lymphography has shown promising results in these tumors, but because marketing authorization for the iron oxide contrast agent is lacking, it is not clinically applicable. Percutaneous CT-guided biopsy in the retroperitoneum and pelvis is introduced as an alternative in the histological exploration of suspicious lymph nodes.
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Abstract
Current advances in magnetic resonance, as a diagnostic modality, are discussed in the context of publications from Investigative Radiology during 2007 and 2008. The articles relating to this topic, published during the past 2 years, are reviewed by anatomic region. The discussion concludes with a consideration of magnetic resonance contrast media, focusing on studies published in the journal, and examining in particular the potential impact of nephrogenic systemic fibrosis.
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Evaluation of Ovarian Tumors by Proton Magnetic Resonance Spectroscopy at Three Tesla. Invest Radiol 2008; 43:745-51. [DOI: 10.1097/rli.0b013e31817e9104] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Value of Diffusion-Weighted Imaging for the Prediction of Prostate Cancer Location at 3T Using a Phased-Array Coil. Invest Radiol 2007; 42:842-7. [DOI: 10.1097/rli.0b013e3181461d21] [Citation(s) in RCA: 158] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Advances in clinical magnetic resonance (MR) are discussed in this review in the context of publications from Investigative Radiology during 2006 and 2007. The articles relevant to this topic, published during this 2 year time period, are considered as organized by anatomic region. An additional final focus of discussion is in regards to those studies involving MR contrast media.
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