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Medullary thyroid carcinoma

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https://www.readbyqxmd.com/read/29774010/efficacy-of-vandetanib-in-treating-locally-advanced-or-metastatic-medullary-thyroid-carcinoma-according-to-recist-criteria-a-systematic-review-and-meta-analysis
#1
Pierpaolo Trimboli, Marco Castellana, Camilla Virili, Francesco Giorgino, Luca Giovanella
Background: Vandetanib is the most largely used tyrosine kinase inhibitor (TKI) in patients with locally advanced and/or metastatic medullary thyroid cancer (MTC). Here, we conducted a systematic review on its efficacy and attempted to perform a meta-analysis adopting standardized RECIST criteria as end-points. Methods: The terms "medullary thyroid" and "protein kinase inhibitor" (then including all TKIs) were searched in PubMed, ClinicalTrials...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29768677/thyroid-fine-needle-aspiration-cytology-causes-of-false-positive-results
#2
REVIEW
Daniela C Malheiros, Sule Canberk, David N Poller, Fernando Schmitt
In this paper, we aim to focus on false positive results in the evaluation of thyroid aspirations, covering cystic, inflammatory, follicular and oncocytic lesions, papillary carcinoma, and medullary carcinoma of thyroid. The recently described entity, "noninvasive follicular thyroid neoplasm with papillary-like nuclear features" (NIFTP), is also discussed detailing the impact of its introduction on the sensitivity and specificity of thyroid FNA, as well as the use of molecular tests for diagnostics...
May 16, 2018: Cytopathology: Official Journal of the British Society for Clinical Cytology
https://www.readbyqxmd.com/read/29766245/-18-f-dopa-pet-cect-in-diagnosis-and-staging-of-primary-medullary-thyroid-carcinoma-prior-to-surgery
#3
Sazan Rasul, Sabrina Hartenbach, Katharina Rebhan, Adelina Göllner, Georgios Karanikas, Marius Mayerhoefer, Peter Mazal, Marcus Hacker, Markus Hartenbach
PURPOSE: Medullary thyroid carcinoma (MTC) is characterized by a high rate of metastasis. In this study we evaluated the ability of [18 F]DOPA PET/ceCT to stage MTC in patients with suspicious thyroid nodules and pathologically elevated serum calcitonin (Ctn) levels prior to total thyroidectomy and lymph node (LN) dissection. METHODS: A group of 32 patients with sonographically suspicious thyroid nodules and pathologically elevated basal Ctn (bCtn) and stimulated Ctn (sCtn) levels underwent DOPA PET/ceCT prior to surgery...
May 15, 2018: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29760189/incidence-and-prevalence-of-sporadic-and-hereditary-mtc-in-denmark-1960-2014-a-nationwide-study
#4
Jes Sloth Mathiesen, Jens Peter Kroustrup, Peter Vestergaard, Kirstine Stochholm, Per Løgstrup Poulsen, Åse Krogh Rasmussen, Ulla Feldt-Rasmussen, Sten Schytte, Stefano Christian Londero, Henrik Baymler Pedersen, Christoffer Holst Hahn, Bjarki Ditlev Djurhuus, Jens Bentzen, Sören Möller, Mette Gaustadnes, Maria Rossing, Finn Cilius Nielsen, Kim Brixen, Anja Lisbeth Frederiksen, Christian Godballe
Recent studies have shown a significant increase in the temporal trend of medullary thyroid carcinoma (MTC) incidence. However, it remains unknown to which extent sporadic medullary thyroid carcinoma (SMTC) and hereditary MTC (HMTC) affects the MTC incidence over time. We conducted a nationwide retrospective study using previously described RET and MTC cohorts combined with review of medical records, pedigree comparison and relevant nationwide registries. The study included 474 MTC patients diagnosed in Denmark between 1960 and 2014...
May 14, 2018: Endocrine Connections
https://www.readbyqxmd.com/read/29754940/radioguided-hepatic-resection-with-18-f-dopa-in-a-patient-with-metastatic-medullary-thyroid-carcinoma
#5
J López-Gómez, S Medina-Ornelas, M A Salazar-Álvarez, M Álvarez-Bojórquez, N Zaragoza-Cruz, J Melchor-Ruan, A Álvarez-Cano
INTRODUCTION: Medullary carcinoma accounts for 1-2% of all thyroid malignancies. 13-20% of patients present with distant metastasis, with 45% of the cases affecting the liver. CLINICAL CASE: A 50-year-old woman, diagnosed with medullary thyroid carcinoma, was treated with total thyroidectomy and a modified neck dissection in 1999. Two lymph node recurrences in the neck were treated with surgical resection; during surveillance, she developed elevated calcitonin levels, the recurrence site was identified with 18 F-DOPA PET/CT in the liver...
May 10, 2018: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/29754602/retracted-imprinted-zno-nanostructure-based-electrochemical-sensing-of-calcitonin-a-clinical-marker-for-medullary-thyroid-carcinoma
#6
Santanu Patra, Ekta Roy, Rashmi Madhuri, Prashant K Sharma
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Editor following concerns raised by various readers. The article reports different electron micrographs for different sample preparations, but some images are of different areas from the same sample. Figure 4E is a magnified section of Figure 4C, and the images are identical as demonstrated by overlapping the images and adjusting for magnification scale...
September 6, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29753028/pituitary-somatolactotropes-evade-an-oncogenic-response-to-ras
#7
Allyson K Roof, Tammy Trudeau, Arthur Gutierrez-Hartmann
Distinct cell types have been shown to respond to activated Ras signaling in a cell-specific manner. In contrast to its pro-tumorigenic role in some human epithelial cancers, oncogenic Ras triggers differentiation of pheochromocytoma cells and medullary thyroid carcinoma cells. Furthermore, we have previously demonstrated that in pituitary somatolactotropes, activated Ras promotes differentiation and is not sufficient to drive tumorigenesis. These findings demonstrate that lactotrope cells have the ability to evade the tumorigenic fate that is often associated with persistent activation of Ras/ERK signaling, and suggest that there may be differential expression of inhibitory signaling molecules or negative cell cycle regulators that act as a brake to prevent the tumorigenic effects of sustained Ras signaling...
May 9, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/29721199/rapid-methods-to-create-a-positive-control-and-identify-the-pax8-ppar%C3%AE-rearrangement-in-fna-thyroid-samples-by-molecular-biology
#8
Emilia Vuttariello, Elio Biffali, Raimondo Pannone, Anna Capiluongo, Mario Monaco, Valentina Sica, Concetta Aiello, Marco Matuozzo, Maria Grazia Chiofalo, Gerardo Botti, Gennaro Chiappetta
Thyroid cancer is the most common malignancy of the endocrine system and includes well-differentiated forms, namely papillary and follicular carcinomas, and the poorly differentiated and undifferentiated forms that result from the transformation of thyroid follicular cells (anaplastic carcinomas). Notably, 5-10% of all thyroid cancers are medullary thyroid cancers that arise from parafollicular cells also known as C cells. The most common genetic mutations in papillary and follicular thyroid cancers are point mutations of the BRAF or RAS genes, while the most common chromosomal alterations are RET/PTC and PAX8/PPARγ rearrangements...
April 10, 2018: Oncotarget
https://www.readbyqxmd.com/read/29707993/procalcitonin-as-a-postoperative-marker-in-the-follow-up-of-patients-affected-by-medullary-thyroid-carcinoma
#9
Pierpaolo Trimboli, Rosa Lauretta, Agnese Barnabei, Stefano Valabrega, Francesco Romanelli, Luca Giovanella, Marialuisa Appetecchia
AIM: Due to the limits of calcitonin, other markers are warranted to better manage medullary thyroid carcinoma patients, and procalcitonin has been reported as promising. Here we aimed to evaluate procalcitonin as a marker of medullary thyroid carcinoma in the post-treatment follow-up. METHODS: Medullary thyroid carcinoma patients previously treated by thyroidectomy were enrolled. After complete imaging work-up (i.e. ultrasonography, computed tomography, magnetic resonance and 18 FDG-PET-CT) we identified patients with structural recurrent/persistent medullary thyroid carcinoma (active medullary thyroid carcinoma) and subjects with no evidence of disease...
April 1, 2018: International Journal of Biological Markers
https://www.readbyqxmd.com/read/29696039/thrombosis-in-thyroid-cancer
#10
REVIEW
Arash Ordookhani, Abbas Motazedi, Kenneth D Burman
Background: The number of studies on venous thromboembolism (VTE) and thyroid cancer is very scarce and existing data are contradictory. This paper reviews VTE in thyroid cancer. Methods: The following words were used for a comprehensive literature review using MEDLINE database: Blood coagulation factors; thyroid hormones; blood coagulation tests; venous thromboembolism; receptors thyroid hormone; hemostasis; fibrinolysis; bleeding; blood coagulation disorders; thyroid neoplasms; Thyroid cancer, papillary; Thyroid cancer, follicular; Thyroid carcinoma, anaplastic; Thyroid cancer, Hurthle cell; Familial medullary thyroid carcinoma; venous thrombosis; Pulmonary embolism; Blood coagulation factors...
January 2018: International Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29692901/primary-high-grade-calcitonin-negative-neuroendocrine-carcinoma-of-the-thyroid-a-very-rare-cancer
#11
Joseph A Chorny, John J Orrego, José Manuel Cameselle-Teijeiro
Most medullary thyroid carcinomas (MTCs) are low grade and produce calcitonin. There are some calcitonin-negative MTCs that produce only calcitonin gene-related peptide (CGRP). Rarely, MTCs are negative for calcitonin and CGRP peptides, but contain their corresponding mRNAs. Primary thyroid neuroendocrine neoplasms other than MTCs are extremely rare. We describe a primary high-grade neuroendocrine carcinoma that was negative for CGRP and calcitonin at both the protein and mRNA levels. A 42-year-old woman presented with a rapidly enlarging thyroid mass replacing most of the left lobe and isthmus...
2018: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29687244/a-population-pharmacokinetic-model-of-cabozantinib-in-healthy-volunteers-and-patients-with-various-cancer-types
#12
Steven Lacy, Bei Yang, Jace Nielsen, Dale Miles, Linh Nguyen, Matt Hutmacher
PURPOSE: An integrated population pharmacokinetic (popPK) model was developed to describe the pharmacokinetics (PK) of tyrosine kinase inhibitor cabozantinib in healthy volunteers (HVs) and patients with various cancer types and to identify any differences in cabozantinib PK across these populations. METHODS: Plasma concentration data used to develop the popPK model were obtained from nine clinical trials (8072 concentrations from 1534 HVs or patients) of cabozantinib in HVs and patients with renal cell carcinoma (RCC), medullary thyroid carcinoma (MTC), glioblastoma multiforme, castration-resistant prostate cancer, or other advanced malignancies...
April 23, 2018: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29680915/medullary-thyroid-carcinoma-application-of-thyroid-imaging-reporting-and-data-system-ti-rads-classification
#13
Gabin Yun, Yeo Koon Kim, Sang Il Choi, Ji-Hoon Kim
PURPOSE: To evaluate the applicability of ultrasound (US)-based Thyroid Imaging Reporting and Data System (TI-RADS) for evaluating medullary thyroid carcinoma (MTC). MATERIALS AND METHODS: US images and medical records of patients with cytopathology-confirmed MTC between June 2003 and November 2016 were retrospectively reviewed. Four independent reviewers (two experienced and two inexperienced radiologists) evaluated 57 pre-operative US images of patients with MTC for shape, composition, echogenicity, margin, calcification of the MTC nodules, and categorized the nodules using TI-RADS classification...
April 21, 2018: Endocrine
https://www.readbyqxmd.com/read/29663723/intraocular-metastasis-of-medullary-thyroid-carcinoma-investigated-by-transscleral-fine-needle-aspiration-a-case-report-and-review-of-the-literature
#14
Małgorzata Gajdzis, Nathalie Cassoux, Maria Lesnik, Caroline Hoffmann, Nathalie Badois, Paweł Gajdzis, Jerzy Klijanienko
Medullary thyroid carcinoma occurs in a sporadic setting and may also be inherited in an autosomal dominant fashion, which is related with germline mutations of the RET gene. Metastases are often present at the time of a diagnosis-most frequently within the cervical lymph nodes, followed by the liver, lungs, and bones. Intraocular metastases are extremely rare. We present a case of choroidal metastasis as a first presentation of disease progression in a patient with Multiple Endocrine Neoplasia type 2A syndrome (MEN2A) who had undergone thyroidectomy 33 years earlier for medullary thyroid carcinoma...
April 16, 2018: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/29663167/structural-studies-on-radiopharmaceutical-dota-minigastrin-analogue-cp04-complexes-and-their-interaction-with-cck2-receptor
#15
Piotr F J Lipiński, Piotr Garnuszek, Michał Maurin, Raphael Stoll, Nils Metzler-Nolte, Artur Wodyński, Jan Cz Dobrowolski, Marta K Dudek, Monika Orzełowska, Renata Mikołajczak
BACKGROUND: The cholecystokinin receptor subtype 2 (CCK-2R) is an important target for diagnostic imaging and targeted radionuclide therapy (TRNT) due to its overexpression in certain cancers (e.g., medullary thyroid carcinoma (MTC)), thus matching with a theranostic principle. Several peptide conjugates suitable for the TRNT of MTC have been synthesized, including a very promising minigastrin analogue DOTA-(DGlu)6 -Ala-Tyr-Gly-Trp-Met-Asp-Phe-NH2 (CP04). In this contribution, we wanted to see whether CP04 binding affinity for CCK-2R is sensitive to the type of the complexed radiometal, as well as to get insights into the structure of CP04-CCK2R complex by molecular modeling...
April 16, 2018: EJNMMI Research
https://www.readbyqxmd.com/read/29650525/flushing-disorders-associated-with-gastrointestinal-symptoms-part-1-neuroendocrine-tumors-mast-cell-disorders-and-hyperbasophila
#16
REVIEW
Vaibhav Rastogi, Devina Singh, Joseph J Mazza, Dennis Yang, Dipendra Parajuli, Steven H Yale
Flushing is the subjective sensation of warmth accompanied by visible cutaneous erythema occurring throughout the body with a predilection for the face, neck, pinnae, and upper trunk where the skin is thinnest and cutaneous vessels are superficially located and in greatest numbers. Flushing can be present in either a wet or dry form depending upon whether neural-mediated mechanisms are involved. Activation of the sympathetic nervous system results in wet flushing, accompanied by diaphoresis, due to concomitant stimulation of eccrine sweat glands...
April 12, 2018: Clinical Medicine & Research
https://www.readbyqxmd.com/read/29644341/uptake-of-99m-tc-mibi-by-sclerosing-pneumocytoma-raising-a-false-suspicion-of-metastasis-from-medullary-thyroid-carcinoma
#17
Georgios E Papadakis, Flavian Tabotta, Igor Levotanec, Michel Gonzalez, John O Prior, Stefano La Rosa, Gerasimos P Sykiotis
Technetium-99m methoxy isobutyl isonitrile (99m Tc-MIBI; sestamibi) single-photon emission computed tomography (SPECT)/computed tomography (CT) performed for preoperative localization of parathyroid adenomas or for other indications can reveal incidentalomas. Interpretation of such findings can be challenging, particularly when thyroid or other endocrine tumors are also present. Preoperative staging of a 59-year-old female patient with medullary thyroid carcinoma (MTC) showing moderate hypermetabolism on 18 F-fluorodeoxyglucose positron emission tomography/CT also detected a slightly hypermetabolic pulmonary nodule (standardized uptake value normalized by body weight max = 2...
April 1, 2018: Journal of the Endocrine Society
https://www.readbyqxmd.com/read/29643661/unusual-metastasis-of-medullary-thyroid-carcinoma-to-the-breast-a-cytological-and-histopathological-correlation
#18
Parul Tanwar, Jatin S Gandhi, Anila Sharma, Manoj Gupta, Partha S Choudhary
Breast metastases are a relatively rare condition and account for approximately 0.5-2% of all breast tumors. Recognition of metastatic tumors in the breast is important because it would prevent unnecessary mutilating surgery and would lead to appropriate treatment of the primary tumor. Breast metastases from medullary thyroid cancer (MTC) are very rare with only 21 reported cases in the literature. Some MTCs mimic primary invasive lobular carcinoma of the breast histopathologically and radiologically, making the distinction between the two diagnostically challenging...
April 2018: Journal of Cytology
https://www.readbyqxmd.com/read/29643655/gata3-immunohistochemical-staining-is-a-useful-marker-for-metastatic-breast-carcinoma-in-fine-needle-aspiration-specimens
#19
Paul W Shield, Stephen J Crouch, David J Papadimos, Michael D Walsh
Aims: The utility of GATA3 immunohistochemistry (IHC) as an aid to the cytological diagnosis of metastatic breast carcinoma in fine needle aspiration (FNA) specimens was investigated. Materials and Methods: Cell block sections from 111 FNA cases of metastatic malignancy were stained for GATA3, including metastases from 43 breast and 44 nonmammary adenocarcinomas, 19 melanomas, 4 urothelial carcinomas, and 1 thyroid medullary carcinoma. Sites sampled included lymph nodes (87), bone (8), liver (5), lung (6), superficial masses (4), and pelvic mass (1)...
April 2018: Journal of Cytology
https://www.readbyqxmd.com/read/29642647/erbb1-and-erbb2-positive-medullary-thyroid-carcinoma-a-case-report
#20
Michele Minuto, Emanuela Varaldo, Gianluca Marcocci, Amleto de Santanna, Ermanno Ciccone, Katia Cortese
Medullary thyroid carcinomas (MTCs) are rare thyroid tumors occurring in both sporadic and hereditary forms, whose pathogenesis is related to RET proto-oncogene alterations. MTCs originate from parafollicular cells, which produce calcitonin that represents the biochemical activity of MTC. Total thyroidectomy is the main treatment for MTC and often cures patients with confined diseases. In the presence of metastasis, the therapeutic approach depends on the rate of disease progression. We report a case of a 54-year-old female with a single, incidentally discovered, thyroid nodule of 1 cm, classified as suspicious MTC after a stimulation test with intravenous (iv) calcium...
April 10, 2018: Diseases (Basel)
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