Clinical Impact of PET Imaging in Patients With Metastatic Prostate Cancer

Prostate cancer (Pca) is the most common cancer and the second leading cause of death among men. Although conventional bone scans and abdominal CT are preferred in most of the guidelines and clinical trials, PET/CT has already started to become the inevitable part of Pca management because of its higher sensitivity and specificity. Radiotracers used for PET imaging show different molecular aspects of the disease process. Although 68Ga–prostate-specific membrane antigen offers the highest sensitivity and specificity, other PET radiotracers such as 18F-FDG and 68Ga-DOTATATE still have a role in patients with prostate-specific membrane antigen–negative diseases such as Pca with neuroendocrine differentiation. In this pictorial essay, we have presented a series of patients with metastatic Pca who had PET images with different radiotracers and discussed the clinical role of this imaging modality in patient management.
Source: Clinical Nuclear Medicine - Category: Nuclear Medicine Tags: Original Articles Source Type: research

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Rationale: Prostate-specific membrane antigen positron emission tomography-computed tomography (18F-PSMA-1007 PET/CT) imaging is an emerging method for the diagnosis of prostate cancer (PC), but its efficiency in detecting other accompanying diseases has rarely been investigated. Patient concerns: A 77-year-old man presented with a complaint of bone pain throughout his entire body lasting for 2 weeks. Routine preoperative whole-body bone scanning revealed multiple osteogenic metastases. His alpha-fetoprotein and prostate-specific antigen levels were 108.2 ng/mL and 53.32 ng/mL, respectively. 18F-PSMA-1007 PET/...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research
In this study, we show that18F-DCFPyl might detect neovasculature in advanced, metastatic differentiated thyroid cancer (DTC). We first stained the preserved lymph node samples of three patients with DTC who had undergone total thyroidectomy and neck dissection for cervical lymph node metastatic disease to identify PSMA expression, with the PSMA antibody (DAKO Monoclonal). Then, we performed18F-DCFPyl imaging in two other advanced DTC patients with elevated serum thyroglobulin (Tg), indicative of residual disease. We compared the findings with contemporaneous FDG PET/CT scan, conventional Imaging (CT,MRI) and whole-body sc...
Source: Medical Oncology - Category: Cancer & Oncology Source Type: research
A 66-year-old man was diagnosed with metastatic prostate cancer to the bones. The patient started 223Ra-dichloride (Xofigo) therapy in April 2019. 99mTc-MDP bone scan and 18F-fluciclovine (Axumin) PET/CT showed discordant but overall complementary findings that indicated disease progression after 5 doses of Xofigo therapy. The patient’s prostate-specific antigen increased from 33.81 ng/mL at baseline before Xofigo therapy and up to 394.3 ng/mL after the fifth dose of Xofigo treatment. Because of disease progression, Xofigo therapy was discontinued.
Source: Clinical Nuclear Medicine - Category: Nuclear Medicine Tags: Interesting Images Source Type: research
ConclusionsThreshold-based contouring using GTVmajority-trained SOSTs achieves an accuracy comparable with manual contours in delineating GTVhisto. The median SOSTs of 41 SUV% for68Ga-PSMA-11 PET and 44 SUV% for18F-PSMA-1007 PET form a base for tracer-specific window levelling.Trial registrationClinicaltrials.gov; NCT03327675; 31-10-2017
Source: European Journal of Nuclear Medicine and Molecular Imaging - Category: Nuclear Medicine Source Type: research
Abstract Biochemically recurrent prostate cancer represents a stage of prostate cancer where conventional (continued on next page) computed tomography and technetium Tc 99m bone scan imaging are unable to detect disease after curative intervention despite rising prostate-specific antigen. There is no clear standard of care and no systemic therapy has been shown to improve survival. Immunotherapy-based treatments potentially are attractive options relative to androgen deprivation therapy due to the generally more favorable side-effect profile. Biochemically recurrent prostate cancer patients have a low tumor burden...
Source: The Urologic Clinics of North America - Category: Urology & Nephrology Authors: Tags: Urol Clin North Am Source Type: research
Conclusion: 225Ac-PSMA-617 TAT showed promising disease control rate, even when all other therapeutic options were exhausted, with low treatment-related toxicities.
Source: Theranostics - Category: Molecular Biology Authors: Tags: Research Paper Source Type: research
Conclusions: After loading into the above nanocomposite, the free CaO2 without a significant antitumor effect can exert excellent antitumor efficacy by responsively releasing ROS under the acidic TME to induce the mitochondria-mediated apoptosis via remarkable oxidative stress and simultaneously minimize damages to normal tissues. The current study presents a new concept of “efficacy-shaping nanomedicine” for the tumor-selective treatment of prostate cancer.
Source: Theranostics - Category: Molecular Biology Authors: Tags: Research Paper Source Type: research
CONCLUSION: We provide Unity system specific recommendations for measuring the ADC. This will increase the consistency of ADC values acquired in different centers on the Unity system, enabling large cohort studies for biomarker discovery and treatment response monitoring. PMID: 33017604 [PubMed - as supplied by publisher]
Source: Radiotherapy and Oncology : journal of the European Society for Therapeutic Radiology and Oncology - Category: Radiology Authors: Tags: Radiother Oncol Source Type: research
This article aims to evaluate the diagnostic value of 68Gallium-PSMA positron emission tomography/computerized tomography (68Ga-PSMA PET/CT) for lymph node (LN) staging in patients with prostate cancer (PCa) by a...
Source: Radiation Oncology - Category: Cancer & Oncology Authors: Tags: Research Source Type: research
Abstract The PI-RADS guidelines set out the minimal technical requirements for the acquisition of multiparametric magnetic resonance imaging (mpMRI) of the prostate. However, the rapid diffusion of this technique has inevitably led to variability in scan quality among centres across the UK and the world. Suboptimal image acquisitionreduces the sensitivity and specificity of this technique for the detection of clinically significant prostate cancer and result in clinicians losing confidence in the technique.Two expert panels (one from the UK and one from the ESUR/ESUI) have stressed the importance to establish qual...
Source: The British Journal of Radiology - Category: Radiology Authors: Tags: Br J Radiol Source Type: research
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