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Medullary thyroid cancer

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313: 372:, trade name Cometriq, was granted marketing approval (November 2012) by the U.S. FDA for this indication. Cabozantinib which is a potent inhibitor of RET, MET and VEGF was evaluated in a double-blind placebo controlled trial. It was shown to improve overall survival by 5 months for the treated cohort vs. placebo, which was not statistically significant. However, cabozantinib was particularly effective in patients with the RET M918T mutation, extending overall survival by roughly 2 years, doubling survival vs. untreated patient (4 years vs. 2 year). Treatment with cabozantinib did require many dose reduction to mitigate side effects. It has been suggested that the trial dose of 140 mg was excessive, particularly in lower body mass patients. Ongoing trials have been scheduled to identify more optimal dosing regimes. Activity has been observed, in practice at doses of 1.2 mg/kg. 210:. Hereditary medullary thyroid cancer is inherited as an autosomal dominant trait, meaning that each child of an affected parent has a 50% probability of inheriting the mutant RET proto-oncogene from the affected parent. DNA analysis makes it possible to identify children who carry the mutant gene; surgical removal of the thyroid in children who carry the mutant gene is curative if the entire thyroid gland is removed at an early age, before there is spread of the tumor. The parathyroid tumors and pheochromocytomas are removed when they cause clinical symptomatology. Hereditary medullary thyroid carcinoma or multiple endocrine neoplasia ( 51: 356:, which block the abnormal kinase proteins involved in the development and growth of medullary cancer cells, showed clear evidence of response in 10-30% of patients. In the majority of responders there has been less than a 30% decrease in tumor mass, yet the responses have been durable; responses have been stable for periods exceeding 3 years. The major side effects of this class of drug include hypertension, nausea, diarrhea, some cardiac electrical abnormalities, and thrombotic or bleeding episodes. 254: 337:
study wrote: "in 40 high risk patients (microscopic residual disease, extraglandular invasion, or lymph node involvement), the local/regional relapse free rate was 86% at 10 years with postoperative external beam radiation (25 patients), and 52% for those with no postoperative external radiation (p = 0.049). To optimize local/regional tumor control, we therefore continue to advise external beam radiation in patients at high risk of local/regional relapse."
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nerve damage, death or the need for second operation to clean out residual diseased lymph nodes left behind if the sentinel node biopsy was positive for cancerous spread. Extensive surgery can be effective when the condition is detected early, but a risk for recurrence remains, particularly in patients with multiple positive lymph nodes or extracapsular invasion. About half of patients have metastasis to regional lymph nodes at the time of diagnosis.
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those with a family history (screening is likely to be initiated at an early age in the hereditary form). Approximately 25-60% of sporadic medullary thyroid carcinomas have a somatic mutation (one that occurs within a single "parafollicular" cell) of the RET proto-oncogene. This mutation is presumed to be the initiating event, although there could be other as yet unidentified causes.
411:(CEA) concentrations in the blood was studied in 65 MTC patients who had abnormal calcitonin levels after surgery (total thyroidectomy and lymph node dissection). The prognosis correlated with the rate at which the postoperative calcitonin concentration doubles, termed the calcitonin doubling time (CDT), rather than the pre- or postoperative absolute calcitonin level: 324:
The European Society of Endocrine Surgeons has published recommendations for managing this condition in gene carriers. The timing of surgery depends on the type of mutation present. For those in the highest risk group, surgery is recommended in the first year of life. In lower risk cases surgery may
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Seventy-five percent of medullary thyroid carcinoma occurs in individuals without an identifiable family history and is assigned the term "sporadic". Individuals who develop sporadic medullary thyroid carcinoma tend to be older and have more extensive disease at the time of initial presentation than
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is recommended when there is a high risk of regional recurrence, even after optimum surgical treatment. In this study, patients treated with external beam radiation were compared to a control group. Disease control with radiation was far superior in the group receiving radiation. The authors of the
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A total thyroidectomy with bilateral neck dissection is the gold standard for treating medullary thyroid cancer, and is the most definitive means of achieving a cure in patients without distant metastases or extensive nodal involvement. Risks of surgery include loss of vocal control, irreparable
284:: between 97.2% and 100%), these results had a high risk of bias due to design flaws of included studies. Overall, the value of routine testing of calcitonin for diagnosis and prognosis of Medullary Thyroid Carcinoma remains uncertain and questionable. 1138: 1123: 261:
Diagnosis is primarily performed via fine needle aspiration of the lesion of the thyroid to distinguish it from other types of thyroid lesions. Microscopic examination will show an amyloid stroma with hyperplasia of parafollicular cells.
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Niederle B, Sebag F, Brauckhoff M (2013) Timing and extent of thyroid surgery for gene carriers of hereditary C cell disease-a consensus statement of the European Society of Endocrine Surgeons (ESES).Langenbecks Arch
245:. In general, measurement of serum CEA is less sensitive than serum calcitonin for detecting the presence of a tumor, but has less minute to minute variability and is therefore useful as an indicator of tumor mass. 795:
Brierley J, Tsang R, Simpson WJ, Gospodarowicz M, Sutcliffe S, Panzarella T (1996). "Medullary thyroid cancer: analyses of survival and prognostic factors and the role of radiation therapy in local control".
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I, 98% at stage II, 81% at stage III and 28% at stage IV. The prognosis of MTC is poorer than that of follicular and papillary thyroid cancer when it has metastasized (spread) beyond the thyroid gland.
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Verbeek HH, de Groot JW, Sluiter WJ, Muller Kobold AC, van den Heuvel ER, Plukker JT, Links TP, et al. (Cochrane Metabolic and Endocrine Disorders Group) (March 2020).
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41 patients out of 41 (100%) were alive at the end of the study. These included 1 patient whose calcitonin was stable, and 11 patients who had decreasing calcitonin levels.
152:, and either symptom may be the first manifestation of the disease. The flushing that occurs in medullary thyroid carcinoma is indistinguishable from that associated with 1029: 102:. Medullary tumors are the third most common of all thyroid cancers and together make up about 3% of all thyroid cancer cases. MTC was first characterized in 1959. 202:
is responsible for nearly all cases of hereditary or familial medullary thyroid carcinoma. Its germline mutation may also be responsible for the development of
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11 patients out of 12 (92%) survived 5 years. 3 patients out of 8 (37%) survived 10 years. 4 patients out of 12 (25%) survived to the end of the study.
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Schlumberger M, Carlomagno F, Baudin E, Bidart JM, Santoro M (2008). "New therapeutic approaches to treat medullary thyroid carcinoma".
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for Medullary Thyroid Carcinoma. Although both basal and combined basal and stimulated calcitonin testing presented high accuracy (
164:). By comparison, the flushing and diarrhea observed in carcinoid syndrome is caused by elevated levels of circulating serotonin. 418:
3 patients out of 12 (25%) survived 5 years. 1 patient out of 12 (8%) survived 10 years. All died within 6 months to 13.3 years.
1051:"Prognostic impact of serum calcitonin and carcinoembryonic antigen doubling-times in patients with medullary thyroid carcinoma" 988:"Prognostic impact of serum calcitonin and carcinoembryonic antigen doubling-times in patients with medullary thyroid carcinoma" 304:
syndrome. Undiagnosed pheochromocytoma leads to a very high intraoperative risk of hypertensive crisis and, potentially, death.
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protein, termed RET (REarranged during Transfection). RET is involved in the regulation of cell growth and development and its
161: 366:(FDA) for treatment of late-stage (metastatic) medullary thyroid cancer in adult patients who are ineligible for surgery. 1026: 125:. When medullary thyroid cancer due to a hereditary genetic disorder occurs without other endocrine tumours it is termed 1554: 931: 904: 363: 281: 277: 226:
While the increased serum concentration of calcitonin is not harmful, it is useful as a marker which can be tested in
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Dionigi G, Bianchi V, Rovera F, et al. (2007). "Medullary thyroid carcinoma: surgical treatment advances".
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Surgery and radiation therapy have been the major treatments for medullary thyroid carcinoma. A plasma level of
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Stamatakos M, Paraskeva P, Stefanaki C, Katsaronis P, Lazaris A, Safioleas K, Kontzoglou K (January 2011).
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be delayed up to the age of ten years, the precise timing depending on the mutation and other factors.
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syndrome. In MTC, the flushing, diarrhea, and itching (pruritus) are all caused by elevated levels of
253: 237:(CEA), also produced by medullary thyroid carcinoma, is released into the blood and it is useful as a 1598: 1506: 1336: 392: 381: 1511: 1399: 1142: 203: 95: 831:
Quayle FJ, Moley JF (2005). "Medullary thyroid carcinoma: including MEN 2A and MEN 2B syndromes".
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Medullary thyroid carcinoma may also produce a thyroid nodule and enlarged cervical lymph nodes.
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since 25% of people found to have medullary thyroid cancer have the inherited form from the
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should be checked before surgical thyroidectomy takes place to evaluate for the presence of
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deposition (left of image). Near normal thyroid follicles are also seen (right of image).
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for medullary thyroid cancer is 80%, 83% or 86%, and the 10-year survival rate is 75%.
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By the American Cancer Society. In turn citing: AJCC Cancer Staging Manual (7th ed).
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Medullary thyroid carcinoma on ultrasound with typical small calcifications (arrows)
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A surgery for MTC showing the central lymph nodes and thyroid gland removed
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The major clinical symptom of metastatic medullary thyroid carcinoma is
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Unlike other differentiated thyroid carcinoma, there is no role for
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Barbet J, Campion L, Kraeber-Bodéré F, Chatal JF (November 2005).
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in the neck, lymph nodes in the central portion of the chest (
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Sites of spread of medullary thyroid carcinoma include local
927:"FDA approves Cometriq to treat rare type of thyroid cancer" 900:"FDA approves new treatment for rare form of thyroid cancer" 438:
doubling time was a better predictor of MTC survival than
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Barbet J, Campion L, Kraeber-Bodéré F, Chatal JF (2005).
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assessed the diagnostic accuracy of basal and stimulated
875:"American Thyroid Association - Thyroid Clinical Trials" 465:
in Pazdur R, Wagman LD, Camphausen KA, Hoskins WJ (Eds)
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Approximately 25% of medullary thyroid cancer cases are
777:. National Comprehensive Cancer Network. Archived from 645:
National Cancer Institute > Medullary Thyroid Cancer
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Numbers from National Cancer Database in the US, from
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The Journal of Clinical Endocrinology and Metabolism
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F. Grünwald; Biersack, H. J.; Grںunwald, F. (2005).
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Hu MI, Vassilopoulou-Sellin R, Lustig R, Lamont JP.
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Malignant thyroid neoplasm originating from C-cells
117:. Medullary thyroid cancer is seen in people with 1093:. American Society of Clinical Oncology (ASCO). 467:Cancer Management: A Multidisciplinary Approach 1232: 8: 951: 949: 668:The Cochrane Database of Systematic Reviews 1239: 1225: 1217: 1106: 49: 32: 1066: 1044: 1042: 1003: 687: 618: 504: 442:but following both tests is recommended. 113:. When MTC occurs by itself it is termed 190:, located on chromosome 10, lead to the 145:episodes. Both occur particularly with 762: 760: 571: 569: 567: 451: 109:in nature, caused by a mutation in the 344:treatment in medullary-type disease. 98:(C cells), which produce the hormone 7: 1091:"ASCO Self-Evaluation Program (SEP)" 657: 655: 653: 640: 638: 457: 455: 61:of medullary thyroid carcinoma with 141:; occasionally a patient will have 119:multiple endocrine neoplasia type 2 403:The prognostic value of measuring 25: 18:Medullary carcinoma of the thyroid 463:"Thyroid and Parathyroid Cancers" 422:CDT between 6 months and 2 years: 380:Depending on source, the overall 127:familial medullary thyroid cancer 115:sporadic medullary thyroid cancer 1337:ACTH-secreting pituitary adenoma 1269:Pancreatic neuroendocrine tumor 713:Nat Clin Pract Endocrinol Metab 186:Mutations (DNA changes) in the 162:calcitonin gene-related peptide 1342:GH-secreting pituitary adenoma 1027:cancer.org > Thyroid Cancer 680:10.1002/14651858.CD010159.pub2 1: 160:gene products (calcitonin or 932:Food and Drug Administration 905:Food and Drug Administration 364:Food and Drug Administration 1248:Tumours of endocrine glands 620:10.1163/22977953-0640102004 1615: 1055:J. Clin. Endocrinol. Metab 530:Expert Rev Anticancer Ther 334:External beam radiotherapy 94:which originates from the 1032:October 18, 2013, at the 647:Last Modified: 12/22/2010 391:into stages I to IV, the 354:protein kinase inhibitors 348:Protein kinase inhibitors 57: 48: 1465:Adrenocortical carcinoma 578:Goldman's Cecil Medicine 542:10.1586/14737140.7.6.877 409:carcinoembryonic antigen 280:: between 82% and 100%; 235:carcinoembryonic antigen 196:receptor tyrosine kinase 88:Medullary thyroid cancer 36:Medullary thyroid cancer 1422:Squamous-cell carcinoma 416:CDT less than 6 months: 1460:Adrenocortical adenoma 810:10.1089/thy.1996.6.305 428:CDT more than 2 years: 317: 258: 784:on 25 September 2006. 725:10.1038/ncpendmet0717 315: 256: 1507:Parathyroid neoplasm 1068:10.1210/jc.2005-0044 1005:10.1210/jc.2005-0044 965:. Berlin: Springer. 393:5-year survival rate 382:5-year survival rate 96:parafollicular cells 1400:Parafollicular cell 768:"Thyroid Carcinoma" 497:10.3892/ol.2010.223 352:Clinical trials of 204:hyperparathyroidism 1180:External resources 576:Goldman L (2011). 318: 259: 188:RET proto-oncogene 133:Signs and symptoms 111:RET proto-oncogene 1581: 1580: 1347:Craniopharyngioma 1328:Pituitary adenoma 1264:Pancreatic cancer 1214: 1213: 998:(11): 6077–6084. 972:978-3-540-22309-2 845:10.1002/jso.20184 270:systematic review 233:A second marker, 200:germline mutation 92:thyroid carcinoma 85: 84: 30:Medical condition 16:(Redirected from 1606: 1477:Pheochromocytoma 1241: 1234: 1227: 1218: 1107: 1095: 1094: 1087: 1081: 1080: 1070: 1046: 1037: 1024: 1018: 1017: 1007: 983: 977: 976: 953: 944: 943: 941: 939: 923: 917: 916: 914: 912: 896: 890: 889: 887: 886: 877:. 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Index

Medullary carcinoma of the thyroid

Micrograph
amyloid
H&E stain
Specialty
ENT surgery
thyroid carcinoma
parafollicular cells
calcitonin
genetic
RET proto-oncogene
multiple endocrine neoplasia type 2
2B
diarrhea
flushing
liver
metastasis
carcinoid
calcitonin
calcitonin gene-related peptide
lymph nodes
mediastinum
RET proto-oncogene
expression
receptor tyrosine kinase
germline mutation
hyperparathyroidism
pheochromocytoma
MEN2

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