MOLECULAR PROFILE AND CLINICAL OUTCOMES IN DIFFERENTIATED THYROID CANCER PATIENTS PRESENTING WITH BONE METASTASIS

被引:4
|
作者
Malik, Nilma [1 ]
Nikitski, Alyaksandr, V [2 ]
Klam, Elie [3 ]
Hunt, Jason [4 ]
Witt, Benjamin [5 ]
Chadwick, Barbara [5 ]
Nikiforov, Yuri E. [2 ]
Abraham, Devaprabu [1 ]
机构
[1] Univ Utah, Div Endocrinol, 615 Arapeen Dr,Suite 100, Salt Lake City, UT 84108 USA
[2] Univ Pittsburgh, Dept Pathol, Pittsburgh, PA USA
[3] Tri Hlth, Cincinnati, OH USA
[4] Univ Utah, Div Ear Nose & Throat, Salt Lake City, UT 84108 USA
[5] Univ Utah, Dept Pathol, Salt Lake City, UT 84108 USA
关键词
TERT PROMOTER MUTATIONS; BRAF V600E MUTATION; DISTANT METASTASES; FOLLICULAR VARIANT; CARCINOMA; MANIFESTATIONS; MORTALITY; DIAGNOSIS; FEATURES;
D O I
10.4158/EP-2019-0265
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Objective: Differentiated thyroid cancer patients uncommonly present with bone metastasis as the initial manifestation. Their molecular profile is largely unknown. The aim of this study was to evaluate the histopathology, molecular profiles, and response to radioactive iodine therapy in these patients. Methods: Eight patients presented with symptomatic bone metastasis from an unknown primary tumor. We identified these patients by performing a retrospective chart review. Pathology slides were reviewed and the molecular analysis of 112 thyroid cancer-related genes was performed on bone metastasis specimens using targeted next-generation sequencing. Results: These patients presented with long bone fractures, spinal cord compression, or intractable bone pain. Histopathologic analysis of the bone and thyroid tumor specimens revealed follicular variant of papillary carcinoma in 7 patients and tall cell variant papillary carcinoma in 1 patient. Primary tumor size ranged from 0.4 to 7.5 cm. All patients received high dose radioiodine therapy following thyroidectomy. Molecular analysis revealed telomerase reverse transcriptase (TERT) mutations in 7 (88%) tumors, 4 (50%) contained co-occurring TERT and RAS GTPase gene (RAS) mutations, 2 had isolated TERT mutations, and 1 had TERT and proto-oncogene B-Raf (BRAF) V600E mutations, respectively. Tumors carrying RAS, TERT, or a combination of these mutations were radioiodineavid, with predictable tumor response and reduction in serum thyroglobulin levels. One patient with radioiodine-refractory disease harbored BRAF and TERT mutations. Conclusion: These results demonstrate that differentiated thyroid cancers presenting with bone metastasis independent of the primary tumor size have a high prevalence of TERT mutations, frequently coexisting with RAS mutations. This molecular signature may predict a favorable response to radioiodine therapy.
引用
收藏
页码:1255 / 1262
页数:8
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