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Alison F Ward, Timothy Lee, Jennifer B Ogilvie, Kepal N Patel, Karen Hiotis, Costas Bizekis, Michael Zervos
One to two percent of ectopic parathyroid adenomas are found in the lower mediastinum and often these are best accessed via a sternotomy or thoracotomy. Video-assisted thoracoscopic surgery (VATS) is an alternative approach with less surgical trauma, decreased morbidity, shorter hospital stays, and superior cosmetic results. Ten years after the first VATS resection of an ectopic mediastinal parathyroid, a robot-assisted thoracoscopic approach was described. Here we describe a series of five robot assisted complete thymectomies in patients with primary hyperparathyroidism due to mediastinal ectopic parathyroid adenomas...
October 22, 2016: Journal of Robotic Surgery
Pim B Olthof, Michal Heger, Krijn P van Lienden, Kora de Bruin, Roelof J Bennink, Thomas M van Gulik
BACKGROUND: Portal vein embolization is the gold standard approach to preoperatively enhance the future liver remnant before liver resection. Portal vein embolization is studied in several experimental animal models; however, clinical translation of results is often difficult. We aimed to examine the translational value of the portal vein embolization response in a standardized rabbit model by comparing the volume and function increase with the response seen in patients. METHODS: Six rabbits were subjected to embolization of the cranial liver lobes, and the hypertrophy response of the caudal liver lobe was studied using computed tomography volumetry and Technetium-99m-labeled-mebrofenin hepatobiliary scintigraphy...
October 18, 2016: Surgery
Krishan Kant Agarwal, Anirban Mukherjee, ArunRaj St, Madhavi Tripathi, Chandrasekhar Bal
OBJECTIVE: To evaluate the incremental value of technetium-99m methylene diphosphonate (Tc-MDP) single-photon emission computed tomography/computed tomography (SPECT/CT) over planar bone scintigraphy (BS) and SPECT for the diagnosis of active condylar hyperplasia (CH). PATIENTS AND METHODS: Data of 21 patients (mean age: 21.9±5.3 years, 10 males, 11 females) who underwent Tc-MDP BS along with regional SPECT/CT for the diagnosis of active CH were retrospectively evaluated...
October 19, 2016: Nuclear Medicine Communications
Luis Schiper, Bluma Linkowski Faintuch, Roberto José da Silva Badaró, Erica Aparecida de Oliveira, Victor E Arana Chavez, Elisangela Chinen, Joel Faintuch
OBJECTIVES: Conventional imaging methods are excellent for the morphological characterization of the consequences of osteonecrosis; however, only specialized techniques have been considered useful for obtaining functional information. To explore the affinity of radiotracers for severely devascularized bone, a new mouse model of isolated femur implanted in a subcutaneous abdominal pocket was devised. To maintain animal mobility and longevity, the femur was harvested from syngeneic donors...
October 1, 2016: Clinics
Jorge Mejia, Ana Claudia Camargo Miranda, Ana Claudia Ranucci Durante, Larissa Rolim de Oliveira, Marycel Rosa Felisa Figols de Barboza, Katerin Taboada Rosell, Daniele Pereira Jardim, Alexandre Holthausen Campos, Marilia Alves Dos Reis, Marcela Forli Catanoso, Orfa Yineth Galvis-Alonso, Francisco Romero Cabral
Objective: To present the result of upgrading a clinical gamma-camera to be used to obtain in vivo tomographic images of small animal organs, and its application to register cardiac, renal and neurological images. Methods: An updated version of the miniSPECT upgrading device was built, which is composed of mechanical, electronic and software subsystems. The device was attached to a Discovery VH (General Electric Healthcare) gamma-camera, which was retired from the clinical service and installed at the Centro de Imagem Pré-Clínica of the Hospital Israelita Albert Einstein...
July 2016: Einstein
Sarah L Smith, Christopher Boothman, Heather A Williams, Beverly L Ellis, Joanna Wragg, Julia M West, Jonathan R Lloyd
Geological disposal of intermediate level radioactive waste in the UK is planned to involve the use of cementitious materials, facilitating the formation of an alkali-disturbed zone within the host rock. The biogeochemical processes that will occur in this environment, and the extent to which they will impact on radionuclide migration, are currently poorly understood. This study investigates the impact of biogeochemical processes on the mobility of the radionuclide technetium, in column experiments designed to be representative of aspects of the alkali-disturbed zone...
October 14, 2016: Science of the Total Environment
Babak Fallahi, Davood Beiki, Yalda Salehi, Alireza Emami-Ardekani, Armaghan Fard-Esfahani, Farahnaz Aghahosseini, Mahdi Haghighatafshar, Mohammad Eftekhari
OBJECTIVE: With respect to the equivocal value of the reverse perfusion pattern (RPP) in technetium-99m (Tc)-sestamibi myocardial perfusion imaging, a study was carried out to evaluate this pattern in association with the presence or absence of coronary artery disease (CAD) and other underlying factors, mainly the time of acquisition and the presence of intense visceral uptake. PATIENTS AND METHODS: We prospectively studied 102 patients with a moderate risk of CAD (41 men and 61 women, mean age: 56...
October 4, 2016: Nuclear Medicine Communications
Magnus von Seth, Miklós Lipcsey, Peter Engström, Anders Larsson, Lars Hillered, Enn Maripuu, Charles Widström, Jan Sjölin
Some experimental data suggest that rapid bolus administration of albumin causes less plasma-expanding effects than slow, continuous infusion. To determine whether rapid bolus administration, in comparison with slow infusion, results in greater extravasation of albumin in experimental septic shock we performed a randomized controlled trial with 32 endotoxemic pigs. The animals were monitored and ventilated with standard intensive care equipment and given 10 mL x kg 5% albumin labeled with Technetium-99m, either as a rapid 15-minute bolus (Bolus group, n = 16) or as a 2-hour (h) infusion (Infusion group, n = 16)...
October 5, 2016: Shock
Dae-Weung Kim, Myoung Hyoun Kim, Chang Guhn Kim
In a ProteoChip‑based screening system and subsequent studies, serine‑aspartic acid‑valine (SDV) was demonstrated to specifically bind to integrin αvβ3. An SDV‑containing peptide could target the tumor vessel and it may be an effective replacement for molecular imaging of the tumor. In the present study, a hexapeptide, SDV‑glutamic acid‑cysteine‑glycine (ECG), was developed and evaluated its diagnostic performance as a tumor imaging agent in tumor‑bearing mice. The hexapeptide SDV‑ECG was synthesized using Fmoc solid‑phase peptide synthesis...
October 6, 2016: Molecular Medicine Reports
Petra Martini, Alessandra Boschi, Gianfranco Cicoria, Licia Uccelli, Micòl Pasquali, Adriano Duatti, Gaia Pupillo, Mario Marengo, Massimo Loriggiola, Juan Esposito
The design and fabrication of a fully-automated, remotely controlled module for the extraction and purification of technetium-99m (Tc-99m), produced by proton bombardment of enriched Mo-100 molybdenum metallic targets in a low-energy medical cyclotron, is here described. After dissolution of the irradiated solid target in hydrogen peroxide, Tc-99m was obtained under the chemical form of (99m)TcO4(-), in high radionuclidic and radiochemical purity, by solvent extraction with methyl ethyl ketone (MEK). The extraction process was accomplished inside a glass column-shaped vial especially designed to allow for an easy automation of the whole procedure...
October 5, 2016: Applied Radiation and Isotopes
Weibin Zhou, Min Chen
INTRODUCTION: Parathyroid crisis due to ectopic parathyroid adenomas can pose diagnostic and management challenges, since it is quite rare in clinical practice. CLINICAL FINDINGS/PATIENT CONCERNS: A 67-year-old Chinese male presented as a parathyroid crisis due to an ectopic mediastinal parathyroid adenoma with his serum calcium and PTH markedly increased in short time. An ultrasonography and computed tomography (CT) scan of the neck did not reveal any parathyroid adenoma...
October 2016: Medicine (Baltimore)
Robert Rosenblatt, Markus Johansson, Farhood Alamdari, Alexander Sidiki, Benny Holmström, Johan Hansson, Janos Vasko, Per Marits, Susanne Gabrielsson, Katrine Riklund, Ola Winqvist, Amir Sherif
PURPOSE: To determine whether sentinel node detection (SNd) in muscle-invasive urothelial bladder cancer (MIBC) can be performed in patients undergoing neoadjuvant chemotherapy (NAC) and determine whether SNd is feasible in all pT stages, including pT0. BACKGROUND: Previous published series of SNd in MIBC have not included patients undergoing NAC, and systematic reports of pT0 patients w/wo NAC were absent. Translational immunological tumor research on MIBC focusing on SNd, in the era of NAC, requires technical feasibility...
October 13, 2016: World Journal of Urology
Raiz Ahmad Misgar, Parvez Mohiuddin Dar, Shariq Rashid Masoodi, Munir Ahmad, Khursheed Alam Wani, Arshad Iqbal Wani, Mir Iftikhar Bashir
BACKGROUND: Although primary hyperparathyroidism (PHPT) has become an asymptomatic disease in the West, in India, PHPT is still an uncommonly diagnosed, overtly symptomatic disease with skeletal, muscular, and renal manifestations. AIMS: To describe the profile and surgical outcome of 78 consecutive PHPT patients over a period of two decades at a single center. MATERIALS AND METHODS: All patients who underwent evaluation and surgery for PHPT from January 1996 to December 2015 were included...
September 2016: Indian Journal of Endocrinology and Metabolism
Parjeet Kaur, Raghav Gattani, Alka Ashmita Singhal, Deepak Sarin, Sowrabh Kumar Arora, Ambrish Mithal
CONTEXT: Preoperative localization of parathyroid adenoma is essential in deciding the surgical approach of parathyroidectomy. AIM: To describe clinical and biochemical profile, evaluate preoperative imaging modalities and surgical approach in patients with primary hyperparathyroidism (PHPT). METHODOLOGY: This was a retrospective study conducted at the single institution. All patients who underwent evaluation and surgery for PHPT from 2011 to 2015 were included in the study...
September 2016: Indian Journal of Endocrinology and Metabolism
B Lakshmi Divya, P Narasimha Rao
SAPHO syndrome (synovitis, acne, pustulosis, hyperostosis, osteitis), a rare inflammatory disorder, is an association of distinct skin disorders with pustules with osteoarticular inflammation. Its etiology remains unclear, and various treatment regimens frequently fail to control the disease. An 18-year-old male patient presented to the outpatient department with severe nodulocystic acne on the face with pain at both the wrists and lower back associated with high-grade fever and chills. On physical examination, he had severe tenderness at both wrist joints and lower back, along with swelling of right wrist...
September 2016: Indian Dermatology Online Journal
Trishan Patel, Amy Elphick, James E Jackson, Claire L Shovlin
OBJECTIVE: To evaluate if injection of intravenous particles may provoke migraines in subjects with right-to-left shunts due to pulmonary arteriovenous malformations (AVMs). BACKGROUND: Migraine headaches commonly affect people with hereditary hemorrhagic telangiectasia (HHT), especially those with pulmonary AVMs that provide right-to-left shunts. In our clinical practice, patients occasionally reported acute precipitation of migraine headaches following injection of technetium-labeled albumin macroaggregates for nuclear medicine scans...
October 11, 2016: Headache
Jose Luis Ortiz, Amparo Ortiz, Javier Milara, Miguel Armengot, Celia Sanz, Desamparados Compañ, Esteban Morcillo, Julio Cortijo
Different image techniques have been used to analyze mucociliary clearance (MCC) in humans, but current small animal MCC analysis using in vivo imaging has not been well defined. Bitter taste receptor (T2R) agonists increase ciliary beat frequency (CBF) and cause bronchodilation but their effects in vivo are not well understood. This work analyzes in vivo nasal and bronchial MCC in guinea pig animals using three dimension (3D) micro-CT-SPECT images and evaluates the effect of T2R agonists. Intranasal macroaggreggates of albumin-Technetium 99 metastable (MAA-Tc99m) and lung nebulized Tc99m albumin nanocolloids were used to analyze the effect of T2R agonists on nasal and bronchial MCC respectively, using 3D micro-CT-SPECT in guinea pig...
2016: PloS One
Xiaofeng Li, Hanyu Liu, Feng Peng
Guided by a simple strategy in search of new superconducting materials, we have performed extensive simulations on crystal structures and electronic properties of Tc-H compounds at high pressures. Three stoichiometries, namely TcH, TcH2, and TcH3, were predicted to be stable under high pressure. The chemical bonding characters of Tc-H compounds were investigated by introducing the electron localization function and electronic projected density of states, which show that the stable Tc-H compounds including TcH, TcH2 and TcH3 are all classified as ionic crystals as a result of Tc → H charge transfer...
October 10, 2016: Physical Chemistry Chemical Physics: PCCP
Lan V Pham, Jerry L Bryant, Richard Mendez, Juan Chen, Archito T Tamayo, Zijun Y Xu-Monette, Ken H Young, Ganiraju C Manyam, David Yang, L Jeffrey Medeiros, Richard J Ford
The hexosamine biosynthetic pathway (HBP) requires two key nutrients glucose and glutamine for O-linked N-acetylglucosamine (O-GlcNAc) cycling, a post-translational protein modification that adds GlcNAc to nuclear and cytoplasmic proteins. Increased GlcNAc has been linked to regulatory factors involved in cancer cell growth and survival. However, the biological significance of GlcNAc in diffuse large B-cell lymphoma (DLBCL) is not well defined. This study is the first to show that both the substrate and the endpoint O-GlcNAc transferase (OGT) enzyme of the HBP were highly expressed in DLBCL cell lines and in patient tumors compared with normal B-lymphocytes...
October 3, 2016: Oncotarget
Michelle Alvares Sarcinelli, Marta de Souza Albernaz, Marzena Szwed, Alexandre Iscaife, Kátia Ramos Moreira Leite, Mara de Souza Junqueira, Emerson Soares Bernardes, Emerson Oliveira da Silva, Maria Ines Bruno Tavares, Ralph Santos-Oliveira
Monoclonal antibodies as polymeric nanoparticles are quite interesting and endow this new drug category with many advantages, especially by reducing the number of adverse reactions and, in the case of radiopharmaceuticals, also reducing the amount of radiation (dose) administered to the patient. In this study, a nanoradiopharmaceutical was developed using polylactic acid (PLA)/polyvinyl alcohol (PVA)/montmorillonite (MMT)/trastuzumab nanoparticles labeled with technetium-99m (99mTc) for breast cancer imaging...
2016: OncoTargets and Therapy
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