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Thyroid imaging

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https://www.readbyqxmd.com/read/28106465/evaluation-of-99m-tc-mibi-in-thyroid-gland-imaging-for-the-diagnosis-and-classification-of-amiodarone-induced-thyrotoxicosis
#1
Junqi Wang, Ruiguo Zhang
OBJECTIVE: Amiodarone-induced thyrotoxicosis (AIT) is caused by aminodaroneas a side effect of cardiovascular disease treatment. Based on the differences in their pathological and physiological mechanisms, many methods have been developed so far to differentiate AIT subtypes such as color flow Doppler sonography (CFDS)and 24 h radioiodine uptake (RAIU). However, these methods suffer from inadequate accuracy in distinguishing different types of AITs and sometimes lead to misdiagnosis and delayed treatments...
January 20, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28105713/whole-remnant-and-maximum-voxel-spect-ct-dosimetry-in-131-i-nai-treatments-of-differentiated-thyroid-cancer
#2
Pablo Mínguez, Glenn Flux, José Genollá, Alejandro Delgado, Emilia Rodeño, Katarina Sjögreen Gleisner
PURPOSE: To investigate the possible differences between SPECT/CT based whole-remnant and maximum-voxel dosimetry in patients receiving radio-iodine ablation treatment of differentiated thyroid cancer (DTC). METHODS: Eighteen DTC patients were administered 1.11 GBq of (131) I-NaI after near-total thyroidectomy and rhTSH stimulation. Two patients had two remnants, so in total dosimetry was performed for 20 sites. Three SPECT/CT scans were performed for each patient at 1, 2, and 3-7 days after administration...
October 2016: Medical Physics
https://www.readbyqxmd.com/read/28105348/thyroid-like-low-grade-nasopharyngeal-papillary-adenocarcinoma-a-case-report
#3
Taro Horino, Osamu Ichii, Kazu Hamada-Ode, Tatsuki Matsumoto, Yoshiko Shimamura, Kosuke Inoue, Yoshio Terada
Thyroid-like low-grade nasopharyngeal papillary adenocarcinoma (TL-LGNPPA) is a rare neoplasm characterized by morphological analogy to papillary thyroid carcinoma and abnormal expression of thyroid transcription factor-1 (TTF-1). We herein report a rare case of TL-LGNPPA with a review of its clinical, morphological and immunohistochemical characteristics. The patient was a 25-year-old Japanese woman complaining of a 2-year history of fever of unknown origin. There were no remarkable physical findings and the laboratory tests, including C-reactive protein levels, were normal...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28104741/recombinant-human-thyroid-stimulating-hormone-versus-thyroid-hormone-withdrawal-in-124i-pet-ct-based-dosimetry-for-131i-therapy-of-metastatic-differentiated-thyroid-cancer
#4
Donika Plyku, Robert F Hobbs, Kevin Huang, Frank Atkins, Carlos Garcia, George Sgouros, Douglas Van Nostrand
PURPOSE: Patients with metastatic differentiated thyroid cancer (DTC) may be prepared using either thyroid stimulating hormone withdrawal (THW) or recombinant human thyroid-stimulating hormone (rhTSH) injections prior to (131)I administration for treatment. The objective of this study was to compare the absorbed dose (D) to the critical organs and tumors determined by (124)I-Positron Emission Tomography/Computed Tomography (PET/CT) based dosimetry for (131)I therapy of metastatic DTC when the same patient was prepared with and imaged after both THW and rhTSH injections...
January 19, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28103285/radioiodinated-exendin-4-is-superior-to-the-radiometal-labelled-glucagon-like-peptide-1-receptor-probes-overcoming-their-high-kidney-uptake
#5
Tilman Läppchen, Roswitha Tönnesmann, Jos Eersels, Philipp T Meyer, Helmut R Maecke, Svetlana N Rylova
GLP-1 receptors are ideal targets for preoperative imaging of benign insulinoma and for quantifying the beta cell mass. The existing clinical tracers targeting GLP-1R are all agonists with low specific activity and very high kidney uptake. In order to solve those issues we evaluated GLP-1R agonist Ex-4 and antagonist Ex(9-39) radioiodinated at Tyr40 side by side with [Nle14,Lys40(Ahx-DOTA-68Ga)NH2]Ex-4 (68Ga-Ex-4) used in the clinic. The Kd, Bmax, internalization and binding kinetics of [Nle14,125I-Tyr40-NH2]Ex-4 and [Nle14,125I-Tyr40-NH2]Ex(9-39) were studied in vitro using Ins-1E cells...
2017: PloS One
https://www.readbyqxmd.com/read/28101487/immunoglobulin-g4-related-thyroid-diseases
#6
REVIEW
Dulani Kottahachchi, Duncan J Topliss
Immunoglobulin G4-related disease (IgG4-RD) is a new disease category involving many organ systems, including the endocrine system in general and the thyroid in particular. Since an initial association was made between hypothyroidism and autoimmune (IgG4-related) pancreatitis, more forms of IgG4-related thyroid disease (IgG4-RTD) have been recognized. Four subcategories of IgG4-RTD have so far been identified: Riedel thyroiditis (RT), fibrosing variant of Hashimoto thyroiditis (FVHT), IgG4-related Hashimoto thyroiditis, and Graves disease with elevated IgG4 levels...
December 2016: European Thyroid Journal
https://www.readbyqxmd.com/read/28101352/shear-wave-elastography-and-contrast-enhanced-ultrasonography-in-the-diagnosis-of-thyroid-malignant-nodules
#7
Mei Chen, Ke-Qin Zhang, You-Feng Xu, Sheng-Min Zhang, Yong Cao, Wei-Qun Sun
The aim of the present study was to evaluate the value of shear wave elastography (SWE) and contrast-enhanced ultrasonography (CEUS) in the diagnosis of thyroid malignant nodules. A total of 253 patients with 319 thyroid nodules were subjected to two-dimensional ultrasound (2DUS) and CEUS examinations prior to thyroidectomy between March, 2014 and December, 2015. Young's modulus value for each nodule on 2DUS and CEUS images were recorded. The sensitivity, specificity and accuracy of 2DUS, SWE and CEUS in the diagnosis of thyroid malignant nodules were assessed...
December 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28099545/cutaneous-adnexal-carcinoma-with-apocrine-differentiation
#8
Vikram Prasad, Wynn H Kao, Grace F Kao
Primary cutaneous apocrine carcinomas are uncommon malignant neoplasms that can be difficult, if not impossible, to distinguish histologically from metastatic breast carcinomas. We present the case of a 71-year-old man with a 5-year history of extensive ulcerated plaques on the posterior neck and posterior scalp. Biopsy revealed a poorly differentiated infiltrating adenocarcinoma consistent with either primary cutaneous apocrine carcinoma or occult metastatic breast carcinoma. Immunohistochemical analysis demonstrated positive staining for cytokeratin (CK) 7, estrogen receptor, and progesterone receptor, and negative staining for p63, podoplanin, CK20, and thyroid transcription factor 1...
December 2016: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28097314/complications-of-bilateral-neck-dissection-in-thyroid-cancer-from-a-single-high-volume-center
#9
Caitlin McMullen, Daniel Rocke, Jeremy Freeman
Importance: The morbidity of bilateral lateral neck dissection (BLND) for thyroid cancers has not been described in detail. This study delineates the specific complications arising from BLND for thyroid cancers at a single high-volume center. Objective: To determine the morbidity associated with BLNDs for differentiated thyroid cancers at our institution. Design, Setting, and Participants: This was a retrospective review of medical records performed to identify patients having undergone BLNDs for thyroid cancers by a single surgeon at an academic, tertiary medical center in Toronto, Ontario, Canada, from 1988 to 2015...
January 12, 2017: JAMA Otolaryngology—Head & Neck Surgery
https://www.readbyqxmd.com/read/28089996/a-comparison-of-lobectomy-and-total-thyroidectomy-for-patients-with-papillary-thyroid-microcarcinoma-a-retrospective-individual-risk-factor-matched-cohort-study
#10
Hyemi Kwon, Min Ji Jeon, Won Gu Kim, Suyeon Park, Mijin Kim, Dong Eun Song, Tae-Yon Sung, Jong Ho Yoon, Suck Joon Hong, Tae Yong Kim, Young-Kee Shong, Won Bae Kim
OBJECTIVE: Papillary thyroid microcarcinoma (PTMC) accounts for most of the increase in thyroid cancer in recent decades. We compared clinical outcomes and surgical complications of lobectomy and total thyroidectomy (TT) for PTMC patients. DESIGN AND METHODS: In this retrospective individual risk factor matched cohort study, 2031 patients with PTMC were initially included. Patients who underwent lobectomy or TT were one-to-one matched according to individual risk factors, including age, sex, primary tumor size, extrathyroidal extension, multifocality, and cervical lymph node (LN) metastasis...
January 15, 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28088216/immunohistochemical-features-of-giant-cell-ependymoma-of-the-filum-terminale-with-unusual-clinical-and-radiological-presentation
#11
Fernando Candanedo-Gonzalez, Cindy Sharon Ortiz-Arce, Samuel Rosales-Perez, Ana Lilia Remirez-Castellanos, Candelaria Cordova-Uscanga, Armando Gamboa-Dominguez
BACKGROUND: Giant cell ependymoma of the filum terminale is a rare variant, generally manifested as a well-circunscribed intradural mass with an indolent biological behavior. CASE PRESENTATION: We describe the case of a 48-year-old Mexican female who non-relevant past medical history, that developed a GCE of the filum terminale. Magnetic resonance imaging and computed tomography revealed the presence of an intra-axial tumor extending from L3 to L5 with extra-medullary invasion...
January 14, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28078216/testosterone-replacement-therapy-role-of-pituitary-and-thyroid-in-diagnosis-and-treatment
#12
REVIEW
Megan Crawford, Laurence Kennedy
Crosstalk among hormones characterizes endocrine function, and assessment of the hypogonadal man should take that into consideration. In men for whom testosterone deficiency is a concern, initial evaluation should include a thorough history and physical exam in which other endocrinopathies are being considered. Hypogonadism can be associated with both pituitary and thyroid dysfunction, for which appropriate biochemical evaluation should be undertaken in certain clinical scenarios. If low serum testosterone is confirmed measurement of luteinizing and follicle stimulating hormones (LH and FSH respectively) is essential to establish whether the hypogonadism is primary or secondary...
December 2016: Translational Andrology and Urology
https://www.readbyqxmd.com/read/28077785/the-diagnostic-performance-of-shear-wave-speed-sws-imaging-for-thyroid-nodules-with-elasticity-modulus-and-sws-measurement
#13
Dan Wang, Ya-Ping He, Yi-Feng Zhang, Bo-Ji Liu, Chong-Ke Zhao, Hui-Jun Fu, Qing Wei, Hui-Xiong Xu
To evaluate the diagnostic performance of a new technique of shear wave speed (SWS) imaging for the diagnosis of thyroid nodule with elasticity modulus and SWS measurement. 322 thyroid nodules in 322 patients (216 benign nodules, 106 malignant nodules) were included in this study. All the nodules received conventional ultrasound (US) and SWS imaging (Aplio500, Toshiba Medical Systems, Japan) before fine-needle aspiration (FNA) and/or surgery. The values of E-max and E-mean with elastic modulus (61.27 ± 36...
January 6, 2017: Oncotarget
https://www.readbyqxmd.com/read/28076605/isolated-primary-amyloidosis-of-the-inferior-rectus-muscle-mimicking-graves-orbitopathy
#14
Mário Luiz Ribeiro Monteiro, Allan Christian Pieroni Gonçalves, Alanna Mara Pinheiro Sobreira Bezerra
The diagnosis of Graves' orbitopathy is usually straightforward. However, orbital diseases that mimick some clinical signs of Graves' orbitopathy may cause diagnostic confusion, particularly when associated to some form of thyroid dysfunction. This report describes the rare occurrence of localized inferior rectus muscle amyloidosis in a patient with autoimmune hypothyroidism, who was misdiagnosed as Graves' orbitopathy. A 48-year-old man complained of painless progressive proptosis on the left side and intermittent vertical diplopia for 6 months...
October 2016: Einstein
https://www.readbyqxmd.com/read/28076008/pictorial-review-of-false-positive-results-on-radioiodine-scintigrams-of-patients-with-differentiated-thyroid-cancer
#15
Amy V Chudgar, Jagruti C Shah
Radioiodine has served an important role in the diagnostic workup and treatment of patients with differentiated thyroid cancer for more than 6 decades. The interpretation of radioiodine scintigraphic studies should be performed in conjunction with a comprehensive history, histopathologic correlation, and pertinent laboratory values, as well as correlation with available anatomic images and the findings from physical examination. A thorough understanding of the physiology and biodistribution of radioiodine is critical when interpreting radioiodine scintigraphic studies to avoid misinterpretation of physiologic and nonthyroid pathologic variants as thyroid cancer metastases...
January 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28072581/-131-i-activity-quantification-of-gamma-camera-planar-images
#16
Raquel Barquero, Hugo P Garcia, Monica G Incio, Pablo Minguez, Alexander Cardenas, Daniel Martínez, Michael Lassmann
A procedure to estimate the activity in target tissues in patients during the therapeutic administration of (131)I radiopharmaceutical treatment for thyroid conditions (hyperthyroidism and differentiated thyroid cancer) using a gamma camera (GC) with a high energy (HE) collimator, is proposed. Planar images are acquired for lesions of different sizes r, and at different distances d, in two HE GC systems. Defining a region of interest (ROI) on the image of size r, total counts n g are measured. Sensitivity S (cps MBq(-1)) in each acquisition is estimated as the product of the geometric G and the intrinsic efficiency η 0...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28072483/optimization-of-ultrasound-transducer-positioning-for-endotracheal-tube-placement-confirmation-in-cadaveric-model
#17
Tiffany Lonchena, Sokpoleak So, James Ibinson, Peter Roolf, Steven L Orebaugh
OBJECTIVES: Sonography has been suggested as a possible means of endotracheal tube (ETT) placement confirmation. However, optimum ultrasound transducer placement has not been established. Using a cadaveric model, ETT placement by the sonographic appearance at the thyroid cartilage, cricoid cartilage, and suprasternal notch in the upper airway was assessed to determine which ultrasound transducer placement offered the most optimal images for ETT confirmation in the airway. METHODS: One provider intubated 5 cadavers, with the ultrasound transducer at each of the 3 levels, for a total of 30 intubations per specimen, while 2 providers assigned a visual score of 1 (subtle), 2 (clear), or 3 (pronounced) to each sonogram of the ETT in the airway...
January 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28072470/sonographic-dynamic-description-of-the-laryngeal-tract-definition-of-quantitative-measures-to-characterize-vocal-fold-motion-and-estimation-of-their-normal-values
#18
Héloïse Bergeret-Cassagne, Diane S Lazard, Muriel Lefort, Siham Hachi, Laurence Leenhardt, Fabrice Menegaux, Gilles Russ, Christophe Trésallet, Frédérique Frouin
Vocal fold motion was analyzed during free breathing using two-dimensional dynamic ultrasound imaging. Two cadavers were first analyzed to define easily identifiable landmarks. Motion of the laryngeal tract was then analyzed in an axial plane. Left and right arytenoids and thyroid cartilage were defined on images corresponding to abduction and adduction of the laryngeal tract. Associated area measurements were established for 50 healthy subjects. All area indices were significantly larger during abduction than adduction...
January 10, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28071987/a-computer-aided-diagnosis-system-using-artificial-intelligence-for-the-diagnosis-and-characterization-of-thyroid-nodules-on-ultrasound-initial-clinical-assessment
#19
Young Jun Choi, Jung Hwan Baek, Hye Sun Park, Woo Hyun Shim, Tae Yong Kim, YoungKee Shong, Jeong Hyun Lee
Background We describe an initial clinical assessment of a new, commercially available, computer-aided diagnosis (CAD) system using artificial intelligence (AI) for thyroid ultrasound, and evaluate its performance in the diagnosis of malignant thyroid nodules and categorization of nodule characteristics. Methods This prospective study protocol was reviewed and approved by the institutional review board. Patients with thyroid nodules with decisive diagnosis, whether benign or malignant on the basis of cytopathologic or US results, were consecutively enrolled from November 2015 to February 2016...
January 10, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28071949/lateral-thyroid-cartilage-thyrotomy-approach-to-an-embedded-paraglottic-fishbone
#20
H T Wong, S Y Tham, K Elangkumaran, Wsj Ng, K J Sia
Fishbones are of particular interest to otolaryngologists. Most fishbones can be removed transorally or via endoscopic guidance. Transcervical neck exploration is occasionally necessary, especially in cases of an embedded foreign body. Computed tomography is the most sensitive and specific imaging modality for identifying embedded fishbones. To our knowledge, this is the first reported case of a laryngeal foreign body embedded in the paraglottic space that was removed using an open approach via a lateral thyroid cartilage window...
January 10, 2017: Annals of the Royal College of Surgeons of England
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