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https://www.readbyqxmd.com/read/28429044/-68-ga-dotatate-pet-ct-in-recurrent-medullary-thyroid-carcinoma-a-lesion-by-lesion-comparison-with-111-in-octreotide-spect-ct-and-conventional-imaging
#1
Lilian Yuri Itaya Yamaga, Marcelo L Cunha, Guilherme C Campos Neto, Marcio R T Garcia, Ji H Yang, Cleber P Camacho, Jairo Wagner, Marcelo B G Funari
PURPOSE: The aim of this study was to prospectively compare the detection rate of (68)Ga-DOTATATE PET-CT with (111)In-octreotide SPECT-CT and conventional imaging (CI) in medullary thyroid carcinoma (MTC) patients with increased calcitonin (Ctn) levels but negative CI after thyroidectomy. METHODS: Fifteen patients with raised Ctn levels and/or CI evidence of recurrence underwent (68)Ga-DOTATATE PET-CT, (111)In-octreotide SPECT-CT and CI. Histopathology, CI and biochemical/clinical/imaging follow-up were used as the reference standard...
April 20, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28418955/late-124i-pet-ct-uptake-measurement-assessment-of-appropriate-examination-protocol-in-benign-thyroid-diseases
#2
Martin Freesmeyer, Anja S Gabler, Christian Kühnel, Thomas Winkens
PURPOSE: This study aimed at investigating the performance of late I PET/CT for radioiodine uptake (RAIU) measurement at 336 hours after administration in patients with benign thyroid diseases requiring radioiodine therapy. Special attention was paid to the comparability of I uptake (I-RAIU) to the clinical standard (I-RAIU, probe measurement). Considering cost aspects, we sought to establish an economically reasonable examination protocol based on scan duration and administered activity...
April 17, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28413794/comparative-evaluation-of-iodine-131-metaiodobenzylguanidine-and-18-fluorodeoxyglucose-positron-emission-tomography-in-assessing-neural-crest-tumors-will-they-play-a-complementary-role
#3
Soumyakanti Kundu, Purushottam Kand, Sandip Basu
BACKGROUND: 18-Fluorodeoxyglucose positron emission tomography (FDG-PET) has established a role in the evaluation of several malignancies. However, its precise clinical role in the neural crest cell tumors continues to evolve. PURPOSE: The purpose of this study was to compare iodine-131 metaiodobenzylguanidine ((131)I-MIBG) and FDG-PET of head to head in patients with neural crest tumors both qualitatively and semiquantitatively and to determine their clinical utility in disease status evaluation and further management...
January 2017: South Asian Journal of Cancer
https://www.readbyqxmd.com/read/28408111/management-of-pet-diagnosed-thyroid-incidentalomas-in-british-columbia-canada-critical-importance-of-the-pet-report
#4
Jordan Wong, Kaidi Liu, Celia Siu, Steven Jones, Marlise Sovka, Don Wilson, Sam M Wiseman
BACKGROUND: PET diagnosed thyroid incidentalomas (TI) should undergo prompt evaluation due to a high risk of underlying malignancy. Our study reviewed physician management of PET diagnosed TIs in British Columbia (BC), Canada. METHODS: All PET reports from BC between 2011 and 2014 were reviewed. Clinical and demographic data was obtained for TI patients through chart review and mail out surveys to physicians. Statistical analysis was performed to identify factors associated with further TI investigation...
March 24, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28393006/small-cell-lung-cancer-transformation-during-immunotherapy-with-nivolumab-a-case-report
#5
Takuma Imakita, Kohei Fujita, Osamu Kanai, Tsuyoshi Terashima, Tadashi Mio
We report a rare case of transformation of non-small cell lung cancer (NSCLC) to small cell lung cancer (SCLC), without epidermal growth factor receptor (EGFR) gene mutation, during immunotherapy treatment with nivolumab. A 75-year-old man was referred to our hospital following the observation of a 64 mm mass in a chest computed tomography (CT) scan. A transbronchial biopsy of the mass identified the pathological presence of poorly differentiated NSCLC, with no histological signs of SCLC. No mutations were identified in the EGFR gene...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/28391026/radiopharmaceuticals-in-the-elderly-cancer-patient-practical-considerations-with-a-focus-on-prostate-cancer-therapy-a-position-paper-from-the-international-society-of-geriatric-oncology-task-force
#6
John O Prior, Silke Gillessen, Manfred Wirth, William Dale, Matti Aapro, Wim J G Oyen
Molecular imaging using radiopharmaceuticals has a clear role in visualising the presence and extent of tumour at diagnosis and monitoring response to therapy. Such imaging provides prognostic and predictive information relevant to management, e.g. by quantifying active tumour mass using positron emission tomography/computed tomography (PET/CT). As these techniques require only pharmacologically inactive doses, age and potential frailty are generally not important. However, this may be different for therapy involving radionuclides because the radiation can impact normal bodily function (e...
April 6, 2017: European Journal of Cancer
https://www.readbyqxmd.com/read/28385795/-18-f-tetrafluoroborate-18-f-tfb-a-pet-probe-for-imaging-sodium-iodide-symporter-expression-whole-body-biodistribution-safety-and-radiation-dosimetry-in-thyroid-cancer-patients
#7
Jim O' Doherty, Maite Jauregui-Osoro, Teresa Brothwood, Teresa Szyszko, Paul Marsden, Michael O' Doherty, Gary Cook, Philip Blower, Val Lewington
Rationale: We report the safety, biodistribution and internal radiation dosimetry, in humans with thyroid cancer, of (18)F-tetrafluoroborate ((18)F-TFB), a novel PET radioligand for imaging the human sodium/iodide symporter (hNIS). Methods: Serial whole-body PET scans of 5 subjects with recently diagnosed with thyroid cancer were acquired prior to surgery for up to 4 hours after injection of 184 ± 15 MBq of (18)F-TFB. Activity was determined in whole blood, plasma and urine. Mean organ absorbed doses and effective doses were calculated via quantitative image analysis and using OLINDA/EXM software...
April 6, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28382155/preclinical-melanoma-imaging-with-68-ga-labeled-%C3%AE-melanocyte-stimulating-hormone-derivatives-using-pet
#8
Chengcheng Zhang, Zhengxing Zhang, Kuo-Shyan Lin, Jinhe Pan, Iulia Dude, Navjit Hundal-Jabal, Nadine Colpo, François Bénard
It is estimated that melanoma accounted for 76,380 new cases and 10,130 deaths in the United States in 2016. The melanocortin 1 receptor (MC1R) is highly expressed in the vast majority of melanomas, which makes it an attractive target for molecular imaging and radionuclide therapy. Lactam bridge-cyclized α-melanocyte-stimulating hormone (Ac-Nle(4)-cyclo[Asp(5)-His-D-Phe(7)-Arg-Trp-Lys(10)]-NH2, or Nle-CycMSHhex) analogues have been successfully developed and studied for MC1R-targeted imaging, predominantly with single-photon emission computed tomography (SPECT)...
2017: Theranostics
https://www.readbyqxmd.com/read/28347527/thyroid-neoplasms-incidental-findings-on-extent-of-disease-evaluation-ct-for-other-pediatric-malignancies
#9
William J Hammond, Todd E Heaton, Benjamin A Farber, Usman A Mahmood, Jill S Gluskin, Suzanne L Wolden, Michael P La Quaglia, Charles A Sklar, Anita P Price
PURPOSE: We performed a retrospective analysis to evaluate the risk of thyroid cancer in incidental thyroid nodules (ITNs) discovered on CT in patients with a history of pediatric cancer. METHODS: With IRB approval we reviewed the records of pediatric oncology patients age ≤21y with newly detected thyroid nodules on surveillance CT of the neck, chest, chest/abdomen/pelvis, or PET/CT performed between April 2008 and March 2015. Patients with <6months of follow-up after incidental findings, a history of primary thyroid malignancy, or incomplete records were excluded...
March 15, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28346249/usefulness-of-68ga-dota-rgd-%C3%AE-v%C3%AE-3-pet-ct-imaging-in-thyroglobulin-elevation-with-negative-iodine-scintigraphy
#10
Rakhee Vatsa, Jaya Shykla, Bhagwant Rai Mittal, Priya Bhusari, Apurva Sood, Rajender Kumar Basher, Anish Bhattacharya
TENIS (thyroglobulin elevation with negative iodine scintigraphy) syndrome in patients with differentiated thyroid carcinoma is not a rare finding. In such patients, F-FDG PET/CT can help in disease evaluation. RGD tripeptide, used for imaging angiogenesis, may also help in disease detection in patients with negative radioiodine whole-body scan. We present 1 such case in whom Ga-RGD tripeptide imaging was helpful in disease detection in the setting of negative radioiodine whole-body scan.
March 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28330699/unusual-case-of-tumor-of-unknown-origin-found-by-18-f-fdg-pet-ct-metastatic-clear-cell-carcinoma-of-the-thyroid-gland
#11
G Treglia, P Trimboli, V Zilioli, F Fulciniti, L Giovanella
No abstract text is available yet for this article.
March 18, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28329426/clinicopathological-characteristics-including-braf-v600e-mutation-status-and-pet-ct-findings-in-papillary-thyroid-carcinoma
#12
Eun Kyoung Choi, Ari Chong, Jung-Min Ha, Chan Kwon Jung, Joo Hyun O, Sung Hoon Kim
OBJECTIVE: We assessed the associations between FDG uptake in primary papillary thyroid carcinomas (PTCs) and clinicopathological features, including the BRAF V600E mutation, using quantitative and qualitative analyses of preoperative PET/CT data. DESIGN AND PATIENTS: This was a retrospective review of 106 patients with PTC who underwent PET/CT scans between February 2009 and January 2011 before undergoing total thyroidectomy. Data collected from surgical specimens were compared with FDG uptake in the primary tumour using quantitative and qualitative analyses of preoperative PET/CT data...
March 22, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28326350/tumor-induced-osteomalacia-secondary-to-anaplastic-thyroid-carcinoma-a-case-report-and-review-of-the-literature
#13
Ejigayehu G Abate, Victor Bernet, Cherise Cortese, Hillary W Garner
CONTEXT: Tumor induced osteomalacia related to anaplastic thyroid cancer has never been reported. OBJECTIVE: We describe a case of tumor induced osteomalacia (TIO) in a patient with a fibroblast growth factor 23 (FGF-23) secreting anaplastic thyroid carcinoma. The current imaging modalities are reviewed. DESIGN AND INTERVENTION: Clinical, biochemical, and radiological assessments were done, including computer tomography (CT) of the neck and skull to thigh positron emission tomography (PET)/CT...
December 2016: Bone Reports
https://www.readbyqxmd.com/read/28321997/laparoscopic-resection-of-retroperitoneal-ectopic-thyroid-tissue
#14
Sawako Tamaki, Yasuyuki Miyakura, Soutoku Someya, Hideki Ishikawa, Nao Kakizawa, Fumi Hasegawa, Hiroyuki Tanaka, Rina Kikugawa, Shingo Tsujinaka, Akira Tanaka, Alan Kawarai Lefor, Toshiki Rikiyama
A 43-year-old otherwise healthy woman was found to have a retroperitoneal mass during a routine medical examination and was referred for further evaluation. Abdominal CT scan showed a well-delineated, low-density area that exhibited heterogeneous contrast enhancement. The area measured about 20 mm in size and was to the left of the aorta at the level of the inferior mesenteric artery. MRI showed a mass with heterogeneous hypointensity on T1 -weighted images and heterogeneous hyperintensity on T2 -weighted images...
March 20, 2017: Asian Journal of Endoscopic Surgery
https://www.readbyqxmd.com/read/28320460/thyroid-incidentalomas-on-18fdg-pet-ct-a-metabolico-pathological-correlation
#15
N Hagenimana, J Dallaire, É Vallée, M Belzile
BACKGROUND: Thyroid incidentaloma is defined as an unsuspected thyroid lesion found on imaging study or while performing a surgery non-related to the thyroid gland. Most recent scientific literature tends to demonstrate a detection rate of 0.1-4.3% for incidental findings of thyroid focal uptake identified by (18)F-fluorodeoxyglugose Positron Emission Tomography with computed tomography ((18)FDG-PET/CT) initially prescribed for nonthyroid disease. From 10.3 to 80.0% of patients who underwent further evaluation are diagnosed with malignant lesions...
March 21, 2017: Journal of Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28315906/nineteen-cases-with-synchronous-multiple-primary-cancers-studied-by-18-f-fdg-pet-ct
#16
Lifang Pang, Guobing Liu, Hongcheng Shi, Pengcheng Hu, Beilei Li, Dengfeng Cheng
OBJECTIVE: To evaluate the value of fluorine -18-fuoro-2-deoxyglucose positron emission tomography/computed tomography ((18)F-FDG PET/CT) in evaluating synchronous multiple primary cancers (SMPC). METHODS: Nineteen patients with pathologically-confirmed SMPC were collected. Clinical and (18)F-FDG PET/CT characteristics of these patients were reviewed and analyzed. Maximum standardized uptake value, (SUVmax) of all lesions was measured and difference (Δ)SUVmax between the SUV of two primary tumors in each patient was calculated as: [(the larger SUVmax - the smaller SUVmax)/ the larger SUVmax]×100%...
January 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/28306727/biodistribution-and-pet-imaging-of-pharmacokinetics-of-manganese-in-mice-using-manganese-52
#17
A Lake Wooten, Tolulope A Aweda, Benjamin C Lewis, Rebecca B Gross, Suzanne E Lapi
Manganese is essential to life, and humans typically absorb sufficient quantities of this element from a normal healthy diet; however, chronic, elevated ingestion or inhalation of manganese can be neurotoxic, potentially leading to manganism. Although imaging of large amounts of accumulated Mn(II) is possible by MRI, quantitative measurement of the biodistribution of manganese, particularly at the trace level, can be challenging. In this study, we produced the positron-emitting radionuclide 52Mn (t1/2 = 5.6 d) by proton bombardment (Ep<15 MeV) of chromium metal, followed by solid-phase isolation by cation-exchange chromatography...
2017: PloS One
https://www.readbyqxmd.com/read/28306621/prognostic-value-of-preoperative-18f-fdg-pet-ct-in-papillary-thyroid-cancer-patients-with-a-high-metastatic-lymph-node-ratio-a-multicenter-retrospective-cohort-study
#18
Seong Young Kwon, Eun Kyoung Choi, Eun Jung Kong, Ari Chong, Jung-Min Ha, Kyung Ah Chun, Ihn Ho Cho, Hee-Seung Bom, Jung-Joon Min, Jahae Kim, Ho-Chun Song, Joo Hyun O, Sung Hoon Kim
OBJECTIVE: Metastatic lymph node ratio (MLNR) is a known significant predictor of disease-free survival in differentiated thyroid cancer. The authors investigated the ability of preoperative fluorine-18 fluorodeoxyglucose (F-FDG) PET/CT to predict recurrence after surgery with radioactive iodine therapy considering MLNR. PATIENTS AND METHODS: A total of 274 patients who underwent preoperative PET/CT and surgery with radioactive iodine therapy were enrolled. The tumor-to-liver uptake ratio on PET/CT was calculated by dividing the maximum standardized uptake value of a primary lesion by the mean standardized uptake value of the normal liver...
May 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28291004/-18-f-fluorodeoxyglucose-positron-emission-tomography-computed-tomography-for-other-thyroid-cancers-medullary-anaplastic-lymphoma-and-so-forth
#19
Mine Araz, Derya Çayır
Positron emission tomography/computed tomography (PET/CT) with (18)F-fluorodeoxyglucose (FDG) is used in staging, restaging, and evaluation of therapy response in many cancers as well as differentiated thyroid carcinomas especially in non-iodine avid variants. Its potential in less frequent thyroid tumors like medullary, anaplastic thyroid cancers, thyroid lymphoma and metastatic tumors of the thyroid however, is not well established yet. The aim of this review is to provide an overview on the recent applications and indications of (18)F-FDG PET/CT in these tumors and to focus on the controversies in the clinical setting...
February 5, 2017: Molecular Imaging and Radionuclide Therapy
https://www.readbyqxmd.com/read/28280965/radiosynthesis-and-first-in-human-pet-mri-evaluation-with-clinical-grade-18-f-ftc-146
#20
Bin Shen, Jun Hyung Park, Trine Hjørnevik, Peter W Cipriano, Daehyun Yoon, Praveen K Gulaka, Dawn Holly, Deepak Behera, Bonnie A Avery, Sanjiv S Gambhir, Christopher R McCurdy, Sandip Biswal, Frederick T Chin
PURPOSE: Sigma-1 receptors (S1Rs) play an important role in many neurological disorders. Simultaneous positron emission tomography (PET)/magnetic resonance imaging (MRI) with S1R radioligands may provide valuable information for diagnosing and guiding treatment for these diseases. Our previously reported S1R radioligand, [(18)F]FTC-146, demonstrated high affinity for the S1R (K i = 0.0025 nM) and excellent selectivity for the S1R over the sigma-2 receptor (S2Rs; K i = 364 nM) across several species (from mouse to non-human primate)...
March 9, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
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