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Prostate imaging

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https://www.readbyqxmd.com/read/29150010/androgen-deprivation-alters-attention-to-sexually-provocative-visual-stimuli-in-elderly-men
#1
Jaime L Palmer-Hague, Vivian Tsang, Charlenn Skead, Richard J Wassersug, Eleni Nasiopoulos, Alan Kingstone
INTRODUCTION: Testosterone is known to regulate male sexual interest, but the exact way that androgens influence men's sexual cognition remains unclear. AIM: To investigate the influence of androgen deprivation (AD) on visual responses to sexually suggestive stimuli in men treated for prostate cancer with AD therapy. METHODS: Patients with AD-treated prostate cancer, patients with prostate cancer not on AD therapy, and age-matched healthy control participants were exposed to images of male and female runway models fully or minimally clothed...
December 2017: Sexual Medicine
https://www.readbyqxmd.com/read/29149993/label-free-determination-of-prostate-specific-membrane-antigen-in-human-whole-blood-at-nanomolar-levels-by-magnetically-assisted-surface-enhanced-raman-spectroscopy
#2
Zuzana Chaloupková, Anna Balzerová, Jitka Bařinková, Zdenka Medříková, Pavel Šácha, Petr Beneš, Václav Ranc, Jan Konvalinka, Radek Zbořil
Prostate cancer is one of the most common cancers among men and can in its later stages cause serious medical problems. Due to the limited suitability of current diagnostic biochemical markers, new biomarkers for the detection of prostate cancer are highly sought after. An ideal biomarker should serve as a reliable prognostic marker, be applicable for early diagnosis, and be applicable for monitoring of therapeutic response. One potential candidate is glutamate carboxypeptidase II (GCPII), also known as prostate specific membrane antigen (PSMA), which has a promising role for direct imaging...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29147764/prospective-evaluation-of-18-f-facbc-pet-ct-and-pet-mri-versus-multiparametric-mri-in-intermediate-to-high-risk-prostate-cancer-patients-flucipro-trial
#3
Ivan Jambor, Anna Kuisma, Esa Kähkönen, Jukka Kemppainen, Harri Merisaari, Olli Eskola, Jarmo Teuho, Ileana Montoya Perez, Marko Pesola, Hannu J Aronen, Peter J Boström, Pekka Taimen, Heikki Minn
PURPOSE: The purpose of this study was to evaluate (18)F-FACBC PET/CT, PET/MRI, and multiparametric MRI (mpMRI) in detection of primary prostate cancer (PCa). METHODS: Twenty-six men with histologically confirmed PCa underwent PET/CT immediately after injection of 369 ± 10 MBq (18)F-FACBC (fluciclovine) followed by PET/MRI started 55 ± 7 min from injection. Maximum standardized uptake values (SUVmax) were measured for both hybrid PET acquisitions. A separate mpMRI was acquired within a week of the PET scans...
November 16, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29146698/characterization-of-site-specifically-conjugated-monomethyl-auristatin-e-and-duocarmycin-based-anti-psma-antibody-drug-conjugates-for-treatment-of-psma-expressing-tumors
#4
Susanne Lütje, Danny Gerrits, Janneke D Molkenboer-Kuenen, Ken Herrmann, Giulio Fracasso, Marco Colombatti, Otto C Boerman, Sandra Heskamp
Rationale: Prostate cancer (PCa) is the most common cancer in men worldwide. In general, PCa responds poorly to chemotherapy. Therefore, antibody-drug conjugates (ADCs) have been developed to specifically deliver highly cytotoxic drugs to the tumor. As the prostate-specific membrane antigen (PSMA) is overexpressed in PCa, it represents a promising target for ADC-based therapies. The aim of this study was to evaluate the therapeutic efficacy of site-specifically conjugated duocarmycin- and monomethyl auristatin E (MMAE)-based anti-PSMA ADCs with drug-antibody ratios (DARs) of 2 and 4...
November 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/29145346/role-of-delayed-time-point-imaging-during-abdominal-and-pelvic-cancer-screening-using-fdg-pet-ct-in-the-general-population
#5
Shotaro Naganawa, Takeharu Yoshikawa, Koichiro Yasaka, Eriko Maeda, Naoto Hayashi, Osamu Abe
Although delayed-time-point imaging is expected to improve the results of [F]-fluorodeoxyglucose (FDG)-positron emission tomography/computed tomography (PET/CT), how examinees will benefit from dual-time-point imaging versus initial-time-point imaging alone, remains unclear. This study investigated the role of delayed-time-point imaging in improving the results of abdominal and pelvic cancer screening using FDG-PET/CT.This retrospective review included 3131 screening results (average subject age: 55.5 years, range: 40-88 years)...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145315/iodine-125-seed-implantation-for-synchronous-pancreatic-metastases-from-hepatocellular-carcinoma-a-case-report-and-literature-review
#6
Junjie Xiong, Selina Kwong Chian, Jiao Li, Xubao Liu
RATIONALE: The image-guided iodine-125 seed implantation has been widely used for a variety of tumors, including prostatic cancer, pulmonary cancer, hepatocellular carcinoma and pancreatic cancer. However, the clinical value of iodine-125 seed implantation for the treatment of pancreatic metastasis from hepatocellular carcinoma has not been reported. We presented the first case with ultrasound-guided iodine-125 seed implantation for this disease. PATIENT CONCERNS: We presented the case of a 48-year-old man patient with primary hepatocellular carcinoma and pancreatic metastasis who was managed with ultrasound-guided iodine-125 seeds implantation...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29145267/osteoblastic-bone-metastases-from-neuroendocrine-tumor-net-of-unknown-origin-detected-by-18fluorocholine-pet-ct-and-its-comparison-with-68gallium-dotatoc-pet-ct-case-report-and-review-of-the-literature
#7
Alberto Bongiovanni, Federica Recine, Monica Celli, Giulia Marcantognini, Flavia Foca, Chiara Liverani, Valentina Fausti, Alessandro De Vita, Giacomo Miserocchi, Laura Mercatali, Dino Amadori, Toni Ibrahim
RATIONALE: Choline (CH) positron emission tomography (PET)/computed tomography (CT) with fluorine 18 (F) CH is increasingly used not only to evaluate patients with biochemically recurrent prostate cancer but also to assess metastatic lesions that are difficult or impossible to identify using more conventional modalities. Our experience with CH PET/CT has shown that it can also be used for many other malignancies. PRESENTING CONCERNS: A 71-year-old male with a neuroendocrine tumor (NET) of unknown origin showed osteoblastic bone metastases positive to F-CH PET...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29144726/physalis-mottle-virus-like-particles-as-nanocarriers-for-imaging-reagents-and-drugs
#8
Hema Masarapu, Bindi K Patel, Paul L Chariou, He Hu, Neetu M Gulati, Bradley L Carpenter, Reza A Ghiladi, Sourabh Shukla, Nicole F Steinmetz
Platform technologies based on plant virus nanoparticles (VNPs) and virus-like particles (VLPs) are attracting the attention of researchers and clinicians because the particles are biocompatible, biodegradable, noninfectious in mammals, and can readily be chemically and genetically engineered to carry imaging agents and drugs. When the Physalis mottle virus (PhMV) coat protein is expressed in Escherichia coli, the resulting VLPs are nearly identical to the viruses formed in vivo. Here, we isolated PhMV-derived VLPs from ClearColi cells and carried out external and internal surface modification with fluorophores using reactive lysine-N-hydroxysuccinimide ester and cysteine-maleimide chemistries, respectively...
November 16, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/29143354/synthesis-and-biological-properties-of-radiohalogenated-%C3%AE-%C3%AE-disubstituted-amino-acids-for-pet-and-spect-imaging-of-amino-acid-transporters-aats
#9
Mark M Goodman, Weiping Yu, Nashwa Jarkas
Fluorine-18 and iodine-123 labeled non-natural alicyclic and methyl branched disubstituted α,α-amino acids are a diverse and useful class of tumor imaging agents suitable for positron emission tomography (PET) and single photon emission computed tomography (SPECT). These tracers target the increased expression of the cell membrane amino acid transporter systems L, ASC and A exhibited by many human tumor cells. The most established clinical use for these radiolabeled amino acids is imaging primary and recurrent gliomas, and primary, recurrent and metastatic prostate cancer...
November 16, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29143253/ruling-out-clinically-significant-prostate-cancer-with-negative-multi-parametric-mri
#10
Julie Y An, Abhinav Sidana, Sarah A Holzman, Joseph A Baiocco, Sherif Mehralivand, Peter L Choyke, Bradford J Wood, Baris Turkbey, Peter A Pinto
PURPOSE: To evaluate the negative predictive value (NPV) of a negative prostate multi-parametric magnetic resonance imaging (mpMRI) in ruling out clinically significant prostate upon 12-core systematic biopsy. METHODS: We retrospectively reviewed 114 men evaluated at our institution who underwent systematic 12-core biopsy within 1 year of a negative prostate mpMRI. Clinicopathologic features were evaluated and NPV was calculated for detection of clinically significant (Gleason ≥ 7) cancer...
November 15, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29141866/prostate-specific-membrane-antigen-cleavage-of-vitamin-b9-stimulates-oncogenic-signaling-through-metabotropic-glutamate-receptors
#11
Charalambos Kaittanis, Chrysafis Andreou, Haley Hieronymus, Ninghui Mao, Catherine A Foss, Matthias Eiber, Gregor Weirich, Palak Panchal, Anuradha Gopalan, Juan Zurita, Samuel Achilefu, Gabriela Chiosis, Vladimir Ponomarev, Markus Schwaiger, Brett S Carver, Martin G Pomper, Jan Grimm
Prostate-specific membrane antigen (PSMA) or folate hydrolase 1 (FOLH1) is highly expressed on prostate cancer. Its expression correlates inversely with survival and increases with tumor grade. However, the biological role of PSMA has not been explored, and its role in prostate cancer remained elusive. Filling this gap, we demonstrate that in prostate cancer, PSMA initiates signaling upstream of PI3K through G protein-coupled receptors, specifically via the metabotropic glutamate receptor (mGluR). PSMA's carboxypeptidase activity releases glutamate from vitamin B9 and other glutamated substrates, which activate mGluR I...
November 15, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29141724/prostatic-abscess-due-to-burkholderia-pseudomallei-facilitating-diagnosis-to-optimize-management
#12
Jowita Kozlowska, Simon Smith, Jay Roberts, Simon Pridgeon, Josh Hanson
Prostatic involvement is common in men with melioidosis. Indeed, some clinicians recommend radiological screening of all male patients as an undrained prostatic abscess may result in relapse of this potentially fatal disease. However, sophisticated medical imaging is frequently unavailable in the remote and resource-poor locations where patients are managed. In this retrospective study from Queensland, Australia, 22/144 (15%) men with melioidosis had a radiologically confirmed prostatic abscess. The absence of urinary symptoms had a negative predictive value (NPV) (95% confidence interval [CI]) for prostatic abscess of 96% (90-99%), whereas a urinary leukocyte count of < 50 × 10(6)/L had an NPV (95% CI) of 100% (94-100%)...
October 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29141559/new-histopathological-genetic-features-to-improve-active-surveillance-selection-for-low-risk-prostate-cancer
#13
Lih-Ming Wong, Kevin Chu, Niall Corcoran, Sam Norden
BACKGROUND: A recent surge in biomarkers to aid management of men with prostate cancer has occurred. Their applications are varied and not all tests are applicable to the active surveillance setting. OBJECTIVE: To review primary evidence on genetic and immunohistochemical biomarkers, and their role on patient selection and risk stratification for men on active surveillance for prostate cancer. EVIDENCE ACQUISITION: A PubMed electronic search using the terms (biomarker or genetic or histopathological) AND ("prostate cancer" AND "active surveillance") was performed from inception to April 2015...
November 13, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/29141018/evaluation-of-the-proliferation-marker-ki-67-in-a-large-prostatectomy-cohort
#14
Elin Richardsen, Sigve Andersen, Samer Al-Saad, Mehrdad Rakaee, Yngve Nordby, Mona Irene Pedersen, Nora Ness, Thea Grindstad, Ingeborg Movik, Tom Dønnem, Roy Bremnes, Lill-Tove Busund
The tumor proliferation index marker Ki-67 is strongly associated with tumor cell proliferation, growth and progression, and is widely used in routine clinicopathological investigation. Prostate cancer is a complex multifaceted and biologically heterogeneous disease, and overtreatment of localized, low volume indolent tumors, is evident. Here, we aimed to assess Ki-67 expression and related outcomes of 535 patients treated with radical prostatectomy. The percentage of tumor epithelial cells expressing Ki-67 was determined by immunohistochemical assay, both digital image analysis and visual scoring by light microscope were used for quantification...
2017: PloS One
https://www.readbyqxmd.com/read/29140118/-11-c-choline-pet-ct-for-detection-and-localization-of-parathyroid-adenomas
#15
Ahmad Parvinian, Erica L Martin-Macintosh, Ajit H Goenka, Jolanta M Durski, Brian P Mullan, Brad J Kemp, Geoffrey B Johnson
OBJECTIVE: The purpose of this study is to determine the efficacy of (11)C-choline PET/CT for the detection of parathyroid adenomas by retrospectively reviewing a large patient population. MATERIALS AND METHODS: In this single-institution retrospective study, 7088 (11)C-choline PET/CT scans performed of 2933 men with prostate cancer from January 2005 through February 2016 were evaluated. Patients with suspected parathyroid adenomas were identified through a review of the electronic medical record and relevant imaging...
November 15, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/29138507/systems-pathology-by-multiplexed-immunohistochemistry-and-whole-slide-digital-image-analysis
#16
Sami Blom, Lassi Paavolainen, Dmitrii Bychkov, Riku Turkki, Petra Mäki-Teeri, Annabrita Hemmes, Katja Välimäki, Johan Lundin, Olli Kallioniemi, Teijo Pellinen
The paradigm of molecular histopathology is shifting from a single-marker immunohistochemistry towards multiplexed detection of markers to better understand the complex pathological processes. However, there are no systems allowing multiplexed IHC (mIHC) with high-resolution whole-slide tissue imaging and analysis, yet providing feasible throughput for routine use. We present an mIHC platform combining fluorescent and chromogenic staining with automated whole-slide imaging and integrated whole-slide image analysis, enabling simultaneous detection of six protein markers and nuclei, and automatic quantification and classification of hundreds of thousands of cells in situ in formalin-fixed paraffin-embedded tissues...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29137438/prognostic-value-of-bone-scan-index-as-an-imaging-biomarker-in-metastatic-prostate-cancer-a-meta-analysis
#17
Dongyang Li, Hang Lv, Xuanyu Hao, Yudi Dong, Huixu Dai, Yongsheng Song
Background: The prognostic value of the bone scan index (BSI) in metastatic prostate cancer (mPCa) remained controversial. Therefore, we performed a meta-analysis to determine the predictive value of BSI and survival in patients with mPCa. Materials and Methods: A literature search was performed in PubMed, Embase, Web of Science and Cochrane library databases. Hazard ratios (HRs), concordance indices (C-indices) were extracted to estimate the relationship between BSI and survival in patients with mPCa...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137414/salvage-lymph-node-dissection-after-68-ga-psma-or-18-f-fec-pet-ct-for-nodal-recurrence-in-prostate-cancer-patients
#18
Annika Herlemann, Alexander Kretschmer, Alexander Buchner, Alexander Karl, Stefan Tritschler, Lina El-Malazi, Wolfgang P Fendler, Vera Wenter, Harun Ilhan, Peter Bartenstein, Christian G Stief, Christian Gratzke
The management of patients with biochemical recurrence (BCR) after definitive treatment for prostate cancer remains controversial. Our aim was to determine survival rates and complications of salvage lymph node dissection (sLND) in patients with recurrent prostate cancer after radical prostatectomy, while evaluating biochemical response (BR) with two different positron emission tomography/computed tomography (PET/CT) tracers used for preoperative imaging. sLND was performed in 104 patients diagnosed with isolated nodal recurrence on either (18)F-fluoroethylcholine ((18)F-FEC) or (68)Ga-PSMA-HBED-CC ((68)Ga-PSMA) PET/CT...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29135073/prostate-cancer-detection-using-quantitative-t2-and-t2-weighted-imaging-the-effects-of-5-alpha-reductase-inhibitors-in-men-on-active-surveillance
#19
Francesco Giganti, Giulio Gambarota, Caroline M Moore, Nicola L Robertson, Neil McCartan, Charles Jameson, Simon R J Bott, Mathias Winkler, Brandon Whitcher, Ramiro Castro-Santamaria, Mark Emberton, Clare Allen, Alex Kirkham
BACKGROUND: T2 -weighted imaging (T2 -WI) information has been used in a qualitative manner in the assessment of prostate cancer. Quantitative derivatives (T2 relaxation time) can be generated from T2 -WI. These outputs may be useful in helping to discriminate clinically significant prostate cancer from background signal. PURPOSE/HYPOTHESIS: To investigate changes in quantitative T2 parameters in lesions and noncancerous tissue of men on active surveillance for prostate cancer taking dutasteride 0...
November 14, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/29134357/apparent-diffusion-coefficient-of-vertebral-haemangiomas-allows-differentiation-from-malignant-focal-deposits-in-whole-body-diffusion-weighted-mri
#20
Jessica M Winfield, Gabriele Poillucci, Matthew D Blackledge, David J Collins, Vallari Shah, Nina Tunariu, Martin F Kaiser, Christina Messiou
OBJECTIVES: The aim of this study was to identify apparent diffusion coefficient (ADC) values for typical haemangiomas in the spine and to compare them with active malignant focal deposits. METHODS: This was a retrospective single-institution study. Whole-body magnetic resonance imaging (MRI) scans of 106 successive patients with active multiple myeloma, metastatic prostate or breast cancer were analysed. ADC values of typical vertebral haemangiomas and malignant focal deposits were recorded...
November 13, 2017: European Radiology
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