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Medullary thyroid carcinoma

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https://www.readbyqxmd.com/read/28929017/calcitonin-receptor-expression-in-medullary-thyroid-carcinoma
#1
Virginia Cappagli, Catarina Soares Potes, Luciana Bueno Ferreira, Catarina Tavares, Catarina Eloy, Rossella Elisei, Manuel Sobrinho-Simões, Peter J Wookey, Paula Soares
BACKGROUND: Calcitonin expression is a well-established marker for medullary thyroid carcinoma (MTC); yet the role of calcitonin receptor (CTR), its seven-transmembrane G-protein coupled receptor, remains to be established in C-cells derived thyroid tumors. The aim of this work was to investigate CTR expression in MTC and to correlate such expression with clinicopathological features in order to evaluate its possible role as a prognostic indicator of disease aggressiveness and outcome...
2017: PeerJ
https://www.readbyqxmd.com/read/28927353/recurrent-metastatic-medullary-thyroid-carcinoma-a-case-of-sustained-response-to-prolonged-treatment-with-somatostatin-analogues
#2
Juana María Cano, Rocío Galán, Rafael López
BACKGROUND: Medullary thyroid carcinoma (MTC) is a rare disease. Treatment options for recurrent disease are limited. Somatostatin analogues might have a role as anticancer agents agents in MTC, although the evidence is inconclusive. PATIENT FINDINGS: A 64-year old male was diagnosed with MTC in January 2010. Total thyroidectomy with neck dissection (stage IVA, pT2pN1bM0, R1) was performed, followed by adjuvant locoregional radiotherapy. Two years later, the patient developed recurrent metastatic disease evidenced by elevated carcinoembryonic antigen (CEA) and calcitonin levels, and a positive uptake (Octreoscan®) in the right adrenal gland and pancreatic head...
September 19, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28925363/generation-of-an-induced-pluripotent-stem-cell-line-from-a-patient-with-hereditary-multiple-endocrine-neoplasia-2b-men2b-syndrome-with-highest-risk-ret-mutation
#3
A Bennaceur-Griscelli, J Hadoux, O Féraud, P Opolon, D Divers, E Gobbo, M Schlumberger, F Griscelli, A G Turhan
Multiple Endocrine Neoplasia Type 2B (MEN2B) is a cancer-predisposing syndrome that affects patients with germline RET mutations. The clinical spectrum of the syndrome includes medullary thyroid carcinoma (MTC) and pheochromocytoma. Currently, there is no satisfactory model recapitulating all the features of the disease especially at the level of stem cells. We generated induced pluripotent stem cells (iPSCs) from a patient with RET mutation at codon 918 who developed pheochromocytoma and MTC. These iPSC had normal karyotype, harboured the RET(M918T) mutation and expressed pluripotency hallmarks...
August 2017: Stem Cell Research
https://www.readbyqxmd.com/read/28921623/one-step-synthesis-of-18-f-cabozantinib-for-use-in-positron-emission-tomography-imaging-of-c-met
#4
Vegard Torp Lien, Jo Klaveness, Dag Erlend Olberg
Cabozantinib is an FDA approved kinase inhibitor for the treatment of medullary thyroid cancer and advanced renal cell carcinoma, which exerts its therapeutic effect by inhibiting, among others, the tyrosine kinase c-Met. Non-invasive imaging techniques are becoming increasingly important clinically to ensure drug efficacy, staging, monitoring and patient stratification. PET isotope labelled tyrosine kinase inhibitors have, for the same reason, potential as PET tracers for imaging of various cancers. Based on cabozantinib, we synthesized the novel boronic acid pinacol ester 4 as a labelling precursor, where the boronic ester moiety replaces the fluorine native to this kinase inhibitor...
September 18, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28911160/response-to-letter-medullary-thyroid-carcinoma-in-men2a-ata-moderate-or-high-risk-ret-mutations-do-not-predict-disease-aggressiveness
#5
Rachel K Voss, Elizabeth G Grubbs
No abstract text is available yet for this article.
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28911158/letter-to-the-editor-medullary-thyroid-carcinoma-in-men2a-ata-moderate-or-high-risk-ret-mutations-do-not-predict-disease-aggressiveness
#6
Frederic Castinetti, Nelson Whollk
No abstract text is available yet for this article.
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28911154/prognostic-significance-of-circulating-ret-m918t-mutated-tumor-dna-in-patients-with-advanced-medullary-thyroid-carcinoma
#7
Gilbert J Cote, Caitlin Evers, Mimi I Hu, Elizabeth G Grubbs, Michelle D Williams, Tao Hai, Dzifa Y Duose, Michal R Houston, Jacquelin H Bui, Meenakshi Mehrotra, Steven G Waguespack, Naifa L Busaidy, Maria E Cabanillas, Mouhammed Amir Habra, Rajyalakshmi Luthra, Steven I Sherman
Context: Interpretation of calcitonin measurement to predict the prognosis of medullary thyroid carcinoma (MTC) requires multiple measurements over an extended time period, making it an imperfect biomarker for evaluating prognosis or disease behavior. Single circulating cell-free DNA (cfDNA) values have been shown to be a valuable prognostic marker for several solid tumors. Objective: We tested the hypothesis that cfDNA containing the RET M918T mutation could be detected in the blood of patients with advanced MTC whose tumor harbored an M918T mutation and would be able to predict overall survival more reliably than calcitonin...
September 1, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28910237/effects-of-once-weekly-exenatide-on-cardiovascular-outcomes-in-type-2-diabetes
#8
Rury R Holman, M Angelyn Bethel, Robert J Mentz, Vivian P Thompson, Yuliya Lokhnygina, John B Buse, Juliana C Chan, Jasmine Choi, Stephanie M Gustavson, Nayyar Iqbal, Aldo P Maggioni, Steven P Marso, Peter Öhman, Neha J Pagidipati, Neil Poulter, Ambady Ramachandran, Bernard Zinman, Adrian F Hernandez
Background The cardiovascular effects of adding once-weekly treatment with exenatide to usual care in patients with type 2 diabetes are unknown. Methods We randomly assigned patients with type 2 diabetes, with or without previous cardiovascular disease, to receive subcutaneous injections of extended-release exenatide at a dose of 2 mg or matching placebo once weekly. The primary composite outcome was the first occurrence of death from cardiovascular causes, nonfatal myocardial infarction, or nonfatal stroke...
September 14, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28902384/-multiple-endocrine-neoplasia
#9
Ludwig Schaaf, Friedhelm Raue
Multiple endocrine neoplasia type 1 and 2 are hereditary cancer syndromes. They are characterized by the occurrence of many benign and malignant tumor types, in MEN1 parathyroid tumors, pituitary tumors, and pancreas tumors, in MEN2 medullary thyroid carcinoma, pheochromocytoma, and parathyroid tumors. The autosomal dominant inherited tumor syndromes are caused by mutations in the MEN1 gene, a tumor suppressor gene, and mutations in the RET gene, an activated oncogene, in MEN2. The clinical expression of the different tumors can vary within and between families, with a good genotype-phenotype correlation in MEN2...
September 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28901320/thyroid-carcinoma-in-children-and-adolescents-clinical-characteristics-and-follow-up-from-two-centers
#10
Jing-Jing Pan, Li Zhao, Rui Cheng, Yang Yang, Yu-Hua Hu
AIM OF STUDY: The aim of this study was to analyze the clinical features and outcomes of thyroid carcinoma (TC) in children and adolescent population treated in our institution. MATERIALS AND METHODS: We gathered 43 TC patients 18 years of age or under initial diagnosed between 2009 and 2010 from two hospitals. Patient's clinical characteristics, laboratory tests, and outcomes were collected and analyzed. RESULTS: (1) The incidence of TC is higher in women (2...
2017: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28891392/-i-esr2-i-gene-and-medullary-thyroid-carcinoma
#11
Macarena Ruiz-Ferrer, Raquel M Fernández, Elena Navarro, Guillermo Antinolo, Salud Borrego
Not required for a letter to the editor.
September 11, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28883261/fine-needle-aspiration-cytology-for-medullary-thyroid-carcinoma-a-single-institutional-experience-in-japan
#12
Ayana Suzuki, Mitsuyoshi Hirokawa, Nami Takada, Miyoko Higuchi, Aki Ito, Naoki Yamao, Toshitetsu Hayashi, Seiji Kuma, Akira Miyauchi
Many cytological studies on medullary thyroid carcinoma (MTC) have been reported; however, such studies in large series of patients with MTC have not been performed. We investigated MTC at a single institution in Japan using fine-needle aspiration cytology (FNAC), and aimed to establish a preoperative diagnostic algorithm for MTC. FNAC was performed in 119 of 149 patients with nodules (79.9%) who ultimately underwent surgical resection. Moreover, hereditary MTC was diagnosed preoperatively in 22 nodules that did not undergo FNAC (39...
September 5, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28883010/laparoscopic-adrenalectomy-as-an-effective-approach-to-massive-bilateral-pheochromocytomas
#13
Diana Martins, Dírcea Rodrigues, Miguel Melo, Francisco Carrilho
Pheochromocytomas are catecholamine-secreting neoplasms, arising from adrenomedullary chromaffin cells. In type 2 multiple endocrine neoplasia (MEN2) syndrome, pheochromocytomas are usually benign but with predisposition to be bilateral (50%-80% of cases).The authors present the case of a young patient diagnosed with uncommonly large bilateral cystic pheochromocytomas and simultaneous detection of medullary thyroid carcinoma. Molecular testing confirmed germline RET codon C634 mutation, consistent with MEN2A syndrome...
September 7, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28881369/-molecular-pathogenesis-of-thyroid-nodules-relevance-for-clinical-care
#14
D Führer, T Musholt, K W Schmid
Thyroid nodules represent heterogeneous tumors with distinct molecular signatures. While benign thyroid nodules correspond to poly- or monoclonal tumors, thyroid carcinomas are monoclonal and thus "real" neoplasms. These are caused by somatic mutations that lead to the constitutive activation of specific signaling cascades and determine the corresponding histology and also partly the functional phenotype of the thyroid tumor. Dedifferentiation of thyroid carcinomas is accompanied by the occurrence of additional mutations in the tumors...
September 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28879586/multiple-myeloma-presenting-as-massive-amyloid-deposition-in-a-parathyroid-gland-associated-with-amyloid-goiter-a-medullary-thyroid-carcinoma-mimic-on-intra-operative-frozen-section
#15
Kirk Hill, Jason Diaz, Ian S Hagemann, Rebecca D Chernock
Clinical examples of amyloid deposition in parathyroid glands are exceedingly rare and usually present as an incidental finding in a patient with amyloid goiter. Here, we present the first histologically documented case of parathyroid amyloid deposition that presented as a mass. The patient did not have hyperparathyroidism. The parathyroid gland was submitted for intra-operative frozen section and concern for medullary thyroid carcinoma was raised. An important histologic clue arguing against medullary thyroid carcinoma was the evenly dispersed nature of the amyloid...
September 6, 2017: Head and Neck Pathology
https://www.readbyqxmd.com/read/28876578/thyroid-cancer-consequences-of-iodine-deficiency-a-persisting-worldwide-problem-characteristics-in-different-populations-portugal-and-south-africa
#16
J E Santos
BACKGROUND: Iodine deficiency (ID) still affects over two billion people worldwide (266 million school aged children). Pathology patterns in ID include: increase in thyroid cancer, higher percentages of follicular and anaplastic cancers and inversion of the papillary/follicular thyroid cancer frequency ratio. China succeeded in eliminating ID through legislation introduced in 1987 aimed at availability of iodized salt countrywide and South Africa through legislation introduced in 1995...
September 2017: South African Journal of Surgery. Suid-Afrikaanse Tydskrif Vir Chirurgie
https://www.readbyqxmd.com/read/28866700/synchronous-papillary-thyroid-carcinoma-and-medullary-thyroid-carcinoma-a-pitfall-waiting-to-happen
#17
P Y Tang, L Y Khor, A Takano
Papillary thyroid carcinoma (PTC) is the most common thyroid carcinoma and is derived from thyroid follicular cells. In contrast, medullary thyroid carcinoma (MTC) is rare and originates from the parafollicular C-cells. Synchronous occurrence of these two carcinomas is uncommon and occurs as either discrete lesions or as a mixed lesion. The current case report describes a 50-year-old woman with synchronous multiple discrete MTC and PTC with lymph nodes metastasis. Pathologists and treating physicians should be aware of the synchronous coexistence of these entities to avoid possible misdiagnosis...
August 2017: Malaysian Journal of Pathology
https://www.readbyqxmd.com/read/28861609/mir-375-and-yap1-expression-profiling-in-medullary-thyroid-carcinoma-and-their-correlation-with-clinical-pathological-features-and-outcome
#18
Francesca Galuppini, Loris Bertazza, Susi Barollo, Elisabetta Cavedon, Massimo Rugge, Vincenza Guzzardo, Diana Sacchi, Sara Watutantrige-Fernando, Federica Vianello, Caterina Mian, Gianmaria Pennelli
Medullary thyroid cancer (MTC) is a tumor marked by an indolent growth for which few prognostic factors and therapeutic strategies are actually available. Different studies have recently appraised well-differentiated thyroid cancers are characterized by a dysregulation in different microRNA sets; however, only few of them investigated the role of miRNA expression in MTCs. In this study, we have assessed the miR-375 expression in a series of 130 MTCs (104 are sporadic and 26 familial) with a median follow-up of 39 months (range 1-138) and then we have correlated our results with the clinical-pathological features and the patients' outcome...
August 31, 2017: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/28857533/-prophylactic-thyroidectomy-in-ret-proto-oncogen-mutation
#19
L Rodríguez Caraballo, J Gómez-Chacón Villalba, P Rodríguez Iglesias, J Cortés Sáez, F Moreno Macián, A Marco Macián, J J Vila Carbó
OBJECTIVE: Analysis of prophylactic thyroidectomy cases carried out in our Center in patients with RET gene mutations. MATERIAL AND METHODS: Retrospective study of 25 patients with RET proto-oncogene mutations subjected to prophylactic thyroidectomy between January 2000 and January 2016. Epidemiologic variables, surgical technique, histological results and follow-up were studied. RESULTS: Our sample consists of 25 patients, 15 males and 10 females...
April 20, 2017: Cirugía Pediátrica: Organo Oficial de la Sociedad Española de Cirugía Pediátrica
https://www.readbyqxmd.com/read/28843253/plasma-calcitonin-levels-and-mirna323-expression-in-medullary-thyroid-carcinoma-patients-with-or-without-ret-mutation
#20
Samira Ehyaei, Mehdi Hedayati, Marjan Zarif-Yeganeh, Sara Sheikholeslami, Mahsa Ahadi, Sayed Asadollah Amini
Background: Medullary thyroid cancer (MTC) is an endocrine tumor featuring parafollicular or C-cell differentiation, with calcitonin as a specific biomarker in MTC diagnosis. Germline mutations in the RET proto-oncogene are considered responsible for its familial occurrence and somatic mutations can cause sporadic lesions. MicroRNAs can act as oncogenes or tumor suppressors by inhibiting the expression of target genes.. The aim of this study was to investigate relationships between plasma levels of calcitonin and miRNA323 expression in MTC patients with or without RET mutation...
August 27, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
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