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https://www.readbyqxmd.com/read/28315906/nineteen-cases-with-synchronous-multiple-primary-cancers-studied-by-18-f-fdg-pet-ct
#1
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%...
March 20, 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
#2
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
#3
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...
March 16, 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
#4
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
#5
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
https://www.readbyqxmd.com/read/28271395/comparing-pre-therapeutic-124-i-and-131-i-uptake-tests-with-intra-therapeutic-131-i-uptake-in-benign-thyroid-disorders
#6
Falk Gühne, Christian Kühnel, Martin Freesmeyer
PURPOSE: (124)I-PET/CT can be used for pre-therapeutic assessment of radioactive iodine uptake in benign thyroid disorders, however systematic comparisons with intra-therapeutic uptake are still lacking for these disorders. The goals of this study were to compare (124)I RAIU and conventional (131)I RAIU tests with each other; to compare both tests with intra-therapeutic uptake (reference); and to verify the time course of radioactive iodine uptake at three time points (30, 102, and 336 h [14 days] post administration; p...
March 7, 2017: Endocrine
https://www.readbyqxmd.com/read/28265641/-nuclear-medicine-in-germany-updated-key-data-and-trends-from-official-statistics
#7
Dirk Hellwig, Jörg Marienhagen, Karin Menhart, Jirka Grosse
AIM: Updated presentation of the spectrum of nuclear medicine in-vivo examinations and therapies from officially available statistics on out-patient and in-patient care as well as trends of structural data on nuclear medicine in Germany. METHODS: Data from the German Federal Health Monitoring, from the frequency statistics of the statutory health insurance for out-patients and from the German Medical Association were used and supplemented by data from selective literature searches...
March 7, 2017: Nuklearmedizin. Nuclear Medicine
https://www.readbyqxmd.com/read/28263215/pituitary-adenoma-recurrence-suspected-on-central-hyperthyroidism-despite-empty-sella-and-confirmed-by-68-ga-dota-toc-pet-ct
#8
Mathieu Gauthé, Julie Sarfati, Nathalie Bourcigaux, Sophie Christin-Maitre, Jean-Noël Talbot, Françoise Montravers
Thyrotropin-secreting pituitary adenomas are very rare tumors, known to present overexpression of somatostatin receptor subtype 2 and which may consequently demonstrate abnormal uptake on Ga-DOTA-TOC PET/CT. A 67-year-old woman with a history of operated pituitary macroadenoma presented with symptoms of hyperthyroidism including a large goiter. Her serum thyroid hormone levels were in favor of central hyperthyroidism. Pituitary MRI depicted an empty sella but visualized an ambiguous lesion centered on the left sphenoidal sinus...
March 3, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28261999/cytological-evaluation-by-fine-needle-aspiration-biopsy-of-incidental-focal-increased-fluorodeoxyglucose-uptake-in-thyroid-on-positron-emission-tomography-scan
#9
Yanchun Li, Min Cui, Nami Azar, Dean Nakamoto, Claire W Michael
BACKGROUND: With the increased use of whole body fluorodeoxyglucose positron emission tomography (PET) scan for staging/restaging or primary diagnosis of neoplasia, thyroid incidentalomas have become more common. The limited reports of PET-positive thyroid incidentalomas showed incidence of malignancy ranging from 14 to 66%, and there is discrepancy in terms of the diagnostic significance of the standard uptake value (SUV) value. METHODS: This is a retrospective study of 20 PET incidentalomas which had cytological evaluation from October 2009 to February 2015 at a tertiary care university medical center, M:F = 8:12...
March 6, 2017: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/28242986/mixed-phenotypic-acute-leukemia-mixed-myeloid-b-cell-with-myeloid-sarcoma-of-the-thyroid-gland-a-rare-entity-with-rarer-asssociation-detected-on-fdg-pet-ct
#10
Gaurav Khanna, Nishikant Avinash Damle, Shipra Agarwal, Maitrayee Roy, Deepali Jain, Soumyaranjan Mallick, Shamim Ahmed, Madhavi Tripathi, Ajay Gogia
Mixed phenotypic acute leukemia (MPAL) is a rare clinical entity. MPAL associated with myeloidsarcoma (MS) is still rarer with only three cases mentioned in English literature. MS has been described in myriads of location, most commonly in skin, gums and lymph nodes. Although theoritically possible, it is very rare to find MS involving the thyroid gland. The diagnosis of MS can be elusive, very often masquerades and mislabeled as lymphoma. A high index of clinical suspicion coupled with PET/CT findings along with morphological clues and thorough peripheral blood, and bone marrow evaluation is mandatory for arriving at the definitive diagnosis...
January 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/28240663/68-ga-dotatate-pet-ct-in-nonneuroendocrine-tumors-a-pictorial-essay
#11
Lilian Yuri Itaya Yamaga, Jairo Wagner, Marcelo Buarque de Gusmão Funari
PET-CT with somatostatin analogs labeled with Ga is increasingly recognized as the best imaging modality for the evaluation of well-differentiated neuroendocrine tumors (NETs). However, somatostatin receptor (SSR) is not an exclusive marker for NET. A variety of tumors other than NETs express SSR, leading to a significant risk of false-positive PET/CT results. We illustrate false-positive Ga-DOTATATE PET/CT findings due to high uptake by non-Hodgkin lymphoma, metastatic meningioma, breast cancer, thyroid adenoma, and papillary carcinoma...
February 24, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28225999/radioactive-iodine-refractory-differentiated-thyroid-cancer-an-uncommon-but-challenging-situation
#12
Angelica Schmidt, Laura Iglesias, Michele Klain, Fabián Pitoia, Martin J Schlumberger
Radioiodine (RAI)-refractory thyroid cancer is an uncommon entity, occurring with an estimated incidence of 4-5 cases/year/million people. RAI refractoriness is more frequent in older patients, in those with large metastases, in poorly differentiated thyroid cancer, and in those tumors with high 18-fluordeoxyglucose uptake on PET/CT. These patients have a 10-year survival rate of less than 10%. In recent years, new therapeutic agents with molecular targets have become available, with multikinase inhibitors (MKIs) being the most investigated drugs...
January 2017: Archives of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28219646/primary-squamous-cell-carcinoma-of-the-thyroid-initial-assessment-and-follow-up-using-18-f-fdg-pet-ct
#13
L Caballero Gullón, E Carmona González, A Martínez Estévez, M P Gómez Camarero, J J Corral, I Borrego Dorado
Squamous cell carcinoma of thyroid is an uncommon, very aggressive neoplasm, having a poor prognosis and poor response to chemotherapy and radiotherapy. Surgery is the initial treatment of choice, although it often presents as a widespread disease at the time of diagnosis, usually with cervical swelling that causes most of the symptoms due to local infiltration or metastasis. Local infiltration from adjacent tumour and metastatic disease needs to be excluded from other primary epidermoid carcinomas, in order to make a correct diagnosis...
February 16, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28216872/thyroid-mass-metastasis-from-nasopharyngeal-cancer-an-unusual-presentation
#14
Shirley C Lewis, Anil K D'cruz, Amit Joshi, Rajiv Kumar, Shubhada V Kane, Sarbani Ghosh Laskar
Thyroid gland is an uncommon site of metastasis, and metastasis to the gland secondary to nasopharyngeal carcinoma is seldom seen. We were only able to identify eight reported cases in the literature. A 61-year-old man, diagnosed case of nasopharyngeal cancer-second primary ( first primary-oropharynx), was found to have a thyroid nodule on routine follow-up positron emission tomography-computed tomography (PET-CT) scan. There was no evidence of metastases at any other sites. The thyroid nodule was confirmed as metastatic carcinoma by fine needle aspiration cytology...
January 2017: Indian Journal of Palliative Care
https://www.readbyqxmd.com/read/28178124/anaplastic-thyroid-carcinoma-and-foscarnet-use-in-a-multitarget-treatment-documented-by-18f-fdg-pet-ct-a-case-report
#15
Elisa Giannetta, Andrea M Isidori, Cosimo Durante, Cira Di Gioia, Flavia Longo, Vincenzo Tombolini, Nadia Bulzonetti, Chiara Graziadio, Riccardo Pofi, Daniele Gianfrilli, Antonella Verrienti, Raffaella Carletti, Sebastiano Filetti, Andrea Lenzi, Alberto Baroli
RATIONALE: The case reported the rapid remission of disease recurrence achieved adding foscarnet, a DNA polymerase inhibitor that interacts with fibroblast growth factor 2, to low molecular weight heparin and sunitinib for the first time in a patient with an anaplastic thyroid cancer (ATC). PATIENT CONCERNS: A 65-year-old woman with a multinodular goiter referred for a rapid enlargement of a nodule. Histological examination revealed an ATC with a little area of papillary thyroid cancer (PTC)...
February 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28160320/utility-of-i-124-pet-ct-in-identifying-radioiodine-avid-lesions-in-differentiated-thyroid-cancer-a-systematic-review-and-meta-analysis
#16
REVIEW
Prasanna Santhanam, David Taieb, Lilja Solnes, Wael Marashdeh, Paul W Ladenson
INTRODUCTION: Diagnostic I-123 scans have been shown to underestimate the disease burden in differentiated thyroid cancer (DTC) when compared to I-131 post treatment scans, especially in children and patients who have had prior Radioiodine (RAI) therapy and/or distant metastasis.I-124 PET/CT has been shown to be highly effective in imaging DTC related metastatic disease. METHODS: We performed a systematic review and meta-analysis of studies investigating the sensitivity and specificity of I-124 PET/CT in identifying lesions amenable to RAI therapy as confirmed by I-131 post-treatment scanning...
February 3, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28155838/periprosthetic-metastatic-lesion-in-stem-region-after-tha-case-study
#17
Janusz Płomiński, Artur Pepłoński, Mateusz Jeśkiewicz
The paper describes a periprosthetic metastatic lesion in the stem region which developed 4 years after cementless total hip arthroplasty in a 64-year-old female patient. The patient underwent primary THA due to osteoarthritis in 2010. In June 2014, she presented with increasing hip pain. Diagnostic imaging revealed a periprosthetic osteolytic lesion in the stem region. The patient was referred to the Orthopaedic Department for further evaluation with a suspicion of pyogenic osteomyelitis. An open surgical biopsy was performed...
November 30, 2016: Ortopedia, Traumatologia, Rehabilitacja
https://www.readbyqxmd.com/read/28134695/multiple-endocrine-neoplasia-type-2b-unmasked-by-18f-fdg-pet-ct-and-131i-mibg-spect-ct
#18
Xun Sun, Maher Mohamad Rajab Arnous, Xiaoli Lan
F-FDG PET/CT was performed to detect an occult malignancy in a 26-year-old woman with complicated medical history which included paroxysmal hypertension and significantly elevated tumor marker. The images revealed lesions in the thyroid, lymph nodes, and bilateral adrenal glands. Further I-MIBG SPECT/CT revealed intense activity in the lesion in the left adrenal gland, which was consistent with pheochromocytoma. The pathology examination after subsequent neck biopsy demonstrated medullary thyroid carcinoma...
January 27, 2017: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/28133747/on-the-potential-for-rf-heating-in-mri-to-affect-metabolic-rates-and-18-fdg-signal-in-pet-mr-simulations-of-long-duration-maximum-normal-mode-heating
#19
Giuseppe Carluccio, Yu-Shin Ding, Jean Logan, Christopher M Collins
PURPOSE: To examine the possibility that MR-induced RF power deposition (SAR) and the resulting effects on temperature-dependent metabolic rates or perfusion rates might affect observed 18FDG signal in PET/MR. METHODS: Using numerical simulations of the SAR, consequent temperature increase, effect on rates of metabolism or perfusion, and [18FDG] throughout the body, we simulated the potential effect of maximum-allowable whole-body SAR for the entire duration of an hour-long PET/MR scan on observed PET signal for two different 18FDG injection times: one hour before onset of imaging and concurrent with the beginning of imaging...
February 2017: Medical Physics
https://www.readbyqxmd.com/read/28133244/-a-case-of-minimal-thyroid-carcinoma-diagnosed-by-a-solitary-pulmonary-metastasis
#20
Hiroshi Kawai, Ryoma Sugimoto, Norichika Iga, Hirokuni Ikeda, Ryosuke Yoshida, Naohisa Waki, Masahiro Ishizaki, Hideyuki Nishi, Kazuki Yamashita
We report a case of minimal thyroid carcinoma diagnosed by a solitary pulmonary metastasis. A 70's man visited a medical practitioner because of chest discomfort, and there was an abnormality on the chest X-ray. Chest computed tomography(CT) showed a nodule in the right middle lobe of the lung. Positron emission tomography with 18-fluorodeoxyglucose(FDG)-PET revealed increased FDG uptake in that tumor, but did not reveal any other lesion. The tumor was clinically suspected to be a carcinoid tumor, primary lung cancer, metastatic lung cancer, or a benign tumor...
November 2016: Gan to Kagaku Ryoho. Cancer & Chemotherapy
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