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de Roode LM, de Boer LL, Da Silva Guimaraes M, van Leeuwen PJ, van der Poel HG, Dashtbozorg B, Ruers TJ. Feasibility of Diffuse Reflection Spectroscopy for Intraoperative Margin Assessment During Prostatectomy. EUR UROL SUPPL 2024; 67:62-68. [PMID: 39229364 PMCID: PMC11369370 DOI: 10.1016/j.euros.2024.07.112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/16/2024] [Indexed: 09/05/2024] Open
Abstract
Background and objective A positive surgical margin (PSM) occurs in up to 32% of patients undergoing robot-assisted radical prostatectomy (RARP). Diffuse reflectance spectroscopy (DRS), which measures tissue composition according to its optical properties, can potentially be used for real-time PSM detection during RARP. Our objective was to assess the feasibility of DRS in distinguishing prostate cancer from benign tissue in RARP specimens. Methods In a single-center prospective study, DRS measurements were taken ex vivo for RARP specimens from 59 patients with biopsy-proven prostate carcinoma. Discriminating features from the DRS spectra were used to create a machine learning-based classification algorithm. The data were split patient-wise into training (70%) and testing (30%) sets, with ten iterations to ensure algorithm robustness. The average sensitivity, specificity, accuracy, and area under the receiver operating characteristic curve (AUC) from ten classification iterations were calculated. Key findings and limitations We collected 542 DRS measurements, of which 53% were tumor and 47% were healthy-tissue measurements. Twenty discriminating features from the DRS spectra were used as the input for a support vector machine model. This model achieved average sensitivity of 89%, specificity of 82%, accuracy of 85%, and AUC of 0.91 for the test set. Limitations include the binary label input for classification. Conclusions and clinical implications DRS can potentially discriminate prostate cancer from benign tissue. Before implementing the technique in clinical practice, further research is needed to assess its performance on heterogeneous tissue volumes and measurements from the prostate surface. Patient summary We looked at the ability of a technique called diffuse reflectance spectroscopy to guide surgeons in discriminating prostate cancer tissue from benign prostate tissue in real time during prostate cancer surgery. Our study showed promising results in an experimental setting. Future research will focus on bringing this technique to clinical practice.
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Affiliation(s)
- Lotte M. de Roode
- Department of Nanobiophysics, University of Twente, Enschede, The Netherlands
- Image-Guided Surgery, Department of Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Lisanne L. de Boer
- Image-Guided Surgery, Department of Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Marcos Da Silva Guimaraes
- Molecular Pathology & Biobanking, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Pim J. van Leeuwen
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Henk G. van der Poel
- Department of Urology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
- Department of Urology, Amsterdam University Medical Centers, VU University, Amsterdam, The Netherlands
| | - Behdad Dashtbozorg
- Image-Guided Surgery, Department of Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
| | - Theo J.M. Ruers
- Department of Nanobiophysics, University of Twente, Enschede, The Netherlands
- Image-Guided Surgery, Department of Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Amsterdam, The Netherlands
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2
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Mancuso A, d’Avanzo N, Cristiano MC, Paolino D. Reflectance spectroscopy: a non-invasive strategy to explore skin reactions to topical products. Front Chem 2024; 12:1422616. [PMID: 38957405 PMCID: PMC11217347 DOI: 10.3389/fchem.2024.1422616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2024] [Accepted: 05/29/2024] [Indexed: 07/04/2024] Open
Abstract
Reflectance spectroscopy has emerged as a powerful analytical technique in the field of dermatology, offering a non-invasive strategy to assess several cutaneous properties and skin response to topical products. By analyzing reflected light across different wavelengths, reflectance spectroscopy allows the quantification of cutaneous parameters, such as erythema index and melanin content. Moreover, this analytical technique enables the monitoring of any changes in skin physiology facilitating the assessment of long-term effects of topical products as well as predicting cutaneous diseases. This review provides an overview of the application of reflectance spectroscopy in investigating skin properties and reaction to topical applied products, including both pharmaceutical and cosmetic formulations, thereby aiding in the development of personalized solutions tailored to individual needs.
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Affiliation(s)
- Antonia Mancuso
- Department of Experimental and Clinical Medicine, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
- Research Center “ProHealth Translational Hub”, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
| | - Nicola d’Avanzo
- Department of Experimental and Clinical Medicine, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
- Research Center “ProHealth Translational Hub”, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
| | - Maria Chiara Cristiano
- Department of Medical and Surgical Sciences, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
- Research Center “ProHealth Translational Hub”, “Magna Graecia” University of Catanzaro, Catanzaro, Italy
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3
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Reistad N, Sturesson C. Distinguishing tumor from healthy tissue in human liver ex vivo using machine learning and multivariate analysis of diffuse reflectance spectra. JOURNAL OF BIOPHOTONICS 2022; 15:e202200140. [PMID: 35860880 DOI: 10.1002/jbio.202200140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/27/2022] [Accepted: 07/12/2022] [Indexed: 06/15/2023]
Abstract
The aim of this work was to evaluate the capability of diffuse reflectance spectroscopy to distinguish malignant liver tissues from surrounding tissues and to determine whether an extended wavelength range (450-1550 nm) offers any advantages over using the conventional wavelength range. Furthermore, multivariate analysis combined with a machine learning algorithm, either linear discriminant analysis or the more advanced support vector machine, was used to discriminate between and classify freshly excised human liver specimens from 18 patients. Tumors were distinguished from surrounding liver tissues with a sensitivity of 99%, specificity of 100%, classification rate of 100% and a Matthews correlation coefficient of 100% using the extended wavelength range and a combination of principal component analysis and support vector techniques. The results indicate that this technology may be useful in clinical applications for real-time tissue diagnostics of tumor margins where rapid classification is important.
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Affiliation(s)
- Nina Reistad
- Department of Physics, Lund University, Lund, Sweden
| | - Christian Sturesson
- Division of Surgery, Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
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olde Heuvel J, de Wit-van der Veen BJ, Huizing DM, van der Poel HG, van Leeuwen PJ, Bhairosing PA, Stokkel MP, Slump CH. State-of-the-art Intraoperative Imaging Technologies for Prostate Margin Assessment: A Systematic Review. Eur Urol Focus 2021; 7:733-741. [DOI: 10.1016/j.euf.2020.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 01/06/2020] [Accepted: 02/05/2020] [Indexed: 12/29/2022]
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5
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Kozhuhov A, Tfilin M, Turgeman G, Ornoy A, Yanai J, Abookasis D. Implementation of a six-around-one optical probe based on diffuse light spectroscopy for study of cerebral properties in a murine mouse model of autism spectrum disorder. APPLIED OPTICS 2020; 59:6809-6816. [PMID: 32788771 DOI: 10.1364/ao.396681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/06/2020] [Indexed: 05/28/2023]
Abstract
Light reflectance spectroscopy (LRS) is a multispectral technique, sensitive to the absorption and scattering properties of biological molecules in tissues. It is used as a noninvasive tool to extract quantitative physiological information from human tissues and organs. A near-infrared LRS based on a single optical probe was used to monitor changes in optical and hemodynamic parameters in a mouse model of autism. A murine model of autism induced by developmental exposure to valproic acid (VPA) was used. Since autism could be attributed to neuroanatomical changes, we hypothesize that these changes can be detected using the LRS because spectral properties depend on both molecular composition and structural changes. The fiber-optic probe in the setup consisted of seven small optical fibers: six fibers for illumination placed in a circular manner around a central single collection fiber. Overall, measurements demonstrate changes in diffused reflectance spectra, cerebral optical tissue properties (absorption and scattering), and chromophore levels. Furthermore, we were able to identify differences between male and female groups. Finally, the effectiveness of S-Adenosylmethionine as a drug therapy was studied and found to improve the hemodynamic outcome. For the first time, to the best of our knowledge, the LRS is utilized to study variations in brain parameters in the VPA autism model mice through an intact scalp.
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Bertoni L, Puliatti S, Reggiani Bonetti L, Maiorana A, Eissa A, Azzoni P, Bevilacqua L, Spandri V, Kaleci S, Zoeir A, Sighinolfi MC, Micali S, Bianchi G, Pellacani G, Rocco B, Montironi R. Ex vivo fluorescence confocal microscopy: prostatic and periprostatic tissues atlas and evaluation of the learning curve. Virchows Arch 2020; 476:511-520. [PMID: 31907606 DOI: 10.1007/s00428-019-02738-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 12/17/2019] [Accepted: 12/22/2019] [Indexed: 12/16/2022]
Abstract
Ex vivo fluorescence confocal microscopy (FCM) is an optical technology that provides fast H&E-like images of freshly excised tissues, and it has been mainly used for "real-time" pathological examination of dermatological malignancies. It has also shown to be a promising tool for fast pathological examination of prostatic tissues. We aim to create an atlas for FCM images of prostatic and periprostatic tissues to facilitate the interpretation of these images. Furthermore, we aimed to evaluate the learning curve of images interpretation of this new technology. Eighty fresh and unprepared biopsies obtained from radical prostatectomy specimens were evaluated using the FCM VivaScope® 2500 M-G4 (Mavig GmbH, Munich, Germany; Caliber I.D.; Rochester NY, USA) by two pathologists. Images of FCM with the corresponding H&E are illustrated to create the atlas. Furthermore, the two pathologists were asked to re-evaluate the 80 specimens after 90 days interval in order to assess the learning curve of images' interpretation of FCM. FCM was able to differentiate between different types of prostatic and periprostatic tissues including benign prostatic glands, benign prostatic hyperplasia, high-grade intraepithelial neoplasm, and prostatic adenocarcinoma. As regards the learning curve, FCM demonstrated a short learning curve. We created an atlas that can serve as the base for urologists and pathologists for learning and interpreting FCM images of prostatic and periprostatic tissues. Furthermore, FCM images is easily interpretable; however, further studies are required to explore the potential applications of this new technology in prostate cancer diagnosis and management.
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Affiliation(s)
- Laura Bertoni
- Department of Surgical, Medical, Dental and Morphological Sciences with Interest transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Stefano Puliatti
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy. .,Department of Urology, Ospedale Policlinico e Nuovo Ospedale Civile S. Agostino Estense Modena, University of Modena and Reggio Emilia, Via del Pozzo, 71, 41124, Modena, Italy.
| | - Luca Reggiani Bonetti
- Department of Pathology, Ospedale Policlinico e Nuovo Ospedale Civile S. Agostino Estense Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Antonino Maiorana
- Department of Pathology, Ospedale Policlinico e Nuovo Ospedale Civile S. Agostino Estense Modena, University of Modena and Reggio Emilia, Modena, Italy
| | - Ahmed Eissa
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy.,Urology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Paola Azzoni
- Department of Surgical, Medical, Dental and Morphological Sciences with Interest transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Luigi Bevilacqua
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Valentina Spandri
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Shaniko Kaleci
- Department of Surgical, Medical, Dental and Morphological Sciences with Interest transplant, Oncological and Regenerative Medicine, University of Modena and Reggio Emilia, Modena, Italy
| | - Ahmed Zoeir
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy.,Urology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | | | - Salvatore Micali
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Giampaolo Bianchi
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Giovanni Pellacani
- Department of Dermatology, University of Modena and Reggio Emilia, Modena, Italy
| | - Bernardo Rocco
- Department of Urology, University of Modena and Reggio Emilia, Modena, Italy
| | - Rodolfo Montironi
- Department of Pathological Anatomy, Polytechnic University of the Marche Region, School of Medicine, United Hospitals, Ancona, Italy
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Fu C, Ma K, Li Z, Wang H, Chen T, Zhang D, Wang S, Mu N, Yang C, Zhao L, Gong S, Feng H, Li F. Rapid, label-free detection of cerebral ischemia in rats using hyperspectral imaging. J Neurosci Methods 2019; 329:108466. [PMID: 31628961 DOI: 10.1016/j.jneumeth.2019.108466] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 10/14/2019] [Accepted: 10/15/2019] [Indexed: 01/27/2023]
Abstract
BACKGROUND Stroke is the third most common cause of disability and the second most common cause of death worldwide. Ischemia, one of the two broad categories of stroke, is characterized by a lack of sufficient amounts of blood in order to supply an adequate amount of oxygen and nutrients. It is important to assess the part of the brain that becomes ischemic and necrotic during neurosurgery or experiments in real time. However, there is currently no effective means to achieve this goal. NEW METHOD We proposed a method based on hyperspectral imaging (HSI) for the real-time detection of a varied range of ischemic brain tissues in vivo or ex vivo and assessed the practical utility of a model of ischemic stroke in rats. RESULTS The results showed that hyperspectral images processed with a ratio of spectral reflectance at 545 and 560 nm (R545/R560) could identify early brain ischemia and accurately show regions of ischemia. COMPARISON WITH EXISTING METHODS We verified the area imaged by HSI using hematoxylin and eosin (HE) and 2, 3, 5-triphenyltetrazolium chloride (TTC) staining methods. This technique could precisely image the ischemic part of the brain in vivo and ex vivo. CONCLUSIONS These results demonstrate the practical utility of HSI for the real-time detection of cerebral ischemia in rats. By providing rapid assessment of brain tissue perfusion, HSI may help doctors recognize ischemic regions quickly and precisely during surgery as well as have great utility in the experimental process.
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Affiliation(s)
- Chuhua Fu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China; Department of Neurosurgery, Xiangyang No. 1 People's Hospital, Hubei University of Medicine, Xiangyang, 441000, China
| | - Kang Ma
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Zhao Li
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Haifeng Wang
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan Province, 621900, China
| | - Tunan Chen
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Dayong Zhang
- Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan Province, 621900, China
| | - Shi Wang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Ning Mu
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Chuanyan Yang
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Lu Zhao
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Sheng Gong
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Hua Feng
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China
| | - Fei Li
- Department of Neurosurgery, Southwest Hospital, Third Military Medical University, Chongqing, 400038, China.
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Peng Y, Prater AR, Deutscher SL. Targeting aggressive prostate cancer-associated CD44v6 using phage display selected peptides. Oncotarget 2017; 8:86747-86768. [PMID: 29156833 PMCID: PMC5689723 DOI: 10.18632/oncotarget.21421] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 08/31/2017] [Indexed: 12/13/2022] Open
Abstract
There is a crucial need to identify new biomarkers associated with aggressive prostate cancer (PCa) including those associated with cancer stem cells (CSCs). CD44v6, generated by alternative splicing of CD44, has been proposed as a CSC biomarker due to its correlation with aggressive PCa disease. We hypothesized that phage display selected peptides that target CD44v6 may serve as theranostic agents for aggressive PCa. Here, a 15 amino acid peptide ("PFT") was identified by affinity selection against a peptide derived from the v6 region of CD44v6. Synthesized PFT exhibited specific binding to CD44v6 with an equilibrium dissociation constant (Kd) of 743.4 nM. PFT also bound CD44v6 highly expressed on human PCa cell lines. Further, an aggressive form of PCa cells (v6A3) was isolated and tagged by a novel CSC reporter vector. The v6A3 cells had a CSC-like phenotype including enriched CD44v6 expression, enhanced clonogenicity, resistance to chemotherapeutics, and generation of heterogeneous offspring. PFT exhibited preferential binding to v6A3 cells compared to parental cells. Immunohistofluorescence studies with human PCa tissue microarrays (TMA) indicated that PFT was highly accurate in detecting CD44v6-positive aggressive PCa cells, and staining positivity was significantly higher in late stage, metastatic and higher-grade samples. Taken together, this study provides for the first time phage display selected peptides that target CD44v6 overexpressed on PCa cells. Peptide PFT may be explored as an aid in the diagnosis and therapy of advanced PCa disease.
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Affiliation(s)
- Ying Peng
- Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, USA.,Department of Biochemistry, University of Missouri-Columbia, Columbia, MO, USA
| | - Austin R Prater
- Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, USA.,Department of Biochemistry, University of Missouri-Columbia, Columbia, MO, USA
| | - Susan L Deutscher
- Research Service, Harry S. Truman Memorial Veterans Hospital, Columbia, MO, USA.,Department of Biochemistry, University of Missouri-Columbia, Columbia, MO, USA
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Lay AH, Wang X, Morgan MSC, Kapur P, Liu H, Roehrborn CG, Cadeddu JA. Detecting positive surgical margins: utilisation of light-reflectance spectroscopy onex vivoprostate specimens. BJU Int 2016; 118:885-889. [DOI: 10.1111/bju.13503] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aaron H. Lay
- Department of Urology; University of Texas Southwestern Medical Center; Dallas TX USA
| | - Xinlong Wang
- Department of Bioengineering; University of Texas at Arlington; Arlington TX USA
| | - Monica S. C. Morgan
- Department of Urology; University of Texas Southwestern Medical Center; Dallas TX USA
| | - Payal Kapur
- Department of Pathology; University of Texas Southwestern Medical Center; Dallas TX USA
| | - Hanli Liu
- Department of Bioengineering; University of Texas at Arlington; Arlington TX USA
| | - Claus G. Roehrborn
- Department of Urology; University of Texas Southwestern Medical Center; Dallas TX USA
| | - Jeffrey A. Cadeddu
- Department of Urology; University of Texas Southwestern Medical Center; Dallas TX USA
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10
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Applications of spectroscopy in diagnosis, staging, and treatment of urologic malignancies. Curr Opin Urol 2016; 26:259-63. [DOI: 10.1097/mou.0000000000000281] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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