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Hernandez-Prera JC, Wenig BM. RAS-Mutant Follicular Thyroid Tumors: A Continuous Challenge for Pathologists. Endocr Pathol 2024:10.1007/s12022-024-09812-5. [PMID: 38888731 DOI: 10.1007/s12022-024-09812-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/20/2024] [Indexed: 06/20/2024]
Abstract
The classification of thyroid nodules, particularly those with a follicular growth pattern, has significantly evolved. These tumors, enriched with RAS or RAS-like mutations, remain challenging for pathologists due to variables such as nuclear atypia, invasion, mitotic activity, and tumor necrosis. This review addresses the histological correlates of benign, low-risk, and malignant RAS-mutant thyroid tumors, as well as some difficult-to-classify follicular nodules with worrisome features. One prototypical RAS-mutant nodule is non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP). The assessment of nuclear characteristics in encapsulated/well-demarcated non-invasive RAS-mutant follicular-patterned tumors helps distinguish between follicular thyroid adenoma (FTA) and NIFTP. Despite this straightforward concept, questions about the degree of nuclear atypia necessary for the diagnosis of NIFTP are common in clinical practice. The nomenclature of follicular nodules lacking clear invasive features with increased mitotic activity, tumor necrosis, and/or high-risk mutations (e.g., TERT promoter or TP53) remains debated. Invasion, particularly angioinvasion, is the current hallmark of malignancy in RAS-mutant follicular-patterned neoplasms, with follicular thyroid carcinoma (FTC) as the model. Assessing the tumor interface is critical, though full capsule evaluation can be challenging. Multiple levels and NRASQ61R-specific immunohistochemistry can aid in identifying invasion. Controversies around vascular invasion persist, with ancillary stains like CD31, ERG, and CD61 aiding in its evaluation. Moreover, the review highlights that invasive encapsulated follicular variant papillary thyroid carcinoma (IEFVPTC) is closely associated with FTC, suggesting the need for better nomenclature. The concept of "high-grade" differentiated carcinomas, applicable to FTC or IEFVPTC with necrosis and/or high mitotic activity, is also discussed.
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Affiliation(s)
- Juan C Hernandez-Prera
- Department of Pathology, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, FL, 33612, USA.
| | - Bruce M Wenig
- Department of Pathology, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, FL, 33612, USA
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Hernandez-Prera JC. Molecular Pathology of Thyroid Tumors: Old Problems and New Concepts. Clin Lab Med 2024; 44:305-324. [PMID: 38821646 DOI: 10.1016/j.cll.2023.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2024]
Abstract
The molecular signatures of many thyroid tumors have been uncovered. These discoveries have translated into clinical practice and are changing diagnostic and tumor classification paradigms. Here, the findings of recent studies are presented with special emphasis on how molecular insights are impacting the understating of RAS mutant thyroid nodules, Hürthel cell neoplasms, and unusual thyroid tumors, such as hyalinizing trabecular tumor, secretory carcinoma of the thyroid, and sclerosing mucoepidermoid carcinoma with eosinophilia. In addition, the utility of detecting actionable molecular alterations by immunohistochemistry in advanced and aggressive thyroid cancer is also discussed.
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Affiliation(s)
- Juan C Hernandez-Prera
- Department of Pathology, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, Florida 33612, USA.
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Fu G, Chazen RS, MacMillan C, Witterick IJ. Discriminating Interpatient Variabilities of RAS Gene Variants for Precision Detection of Thyroid Cancer. JAMA Netw Open 2024; 7:e2411919. [PMID: 38758552 PMCID: PMC11102019 DOI: 10.1001/jamanetworkopen.2024.11919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 03/18/2024] [Indexed: 05/18/2024] Open
Abstract
Importance Interpatient variabilities in genomic variants may reflect differences in tumor statuses among individuals. Objectives To delineate interpatient variabilities in RAS variants in thyroid tumors based on the fifth World Health Organization classification of thyroid neoplasms and assess their diagnostic significance in cancer detection among patients with thyroid nodules. Design, Setting, and Participants This prospective diagnostic study analyzed surgically resected thyroid tumors obtained from February 2016 to April 2022 and residual thyroid fine-needle aspiration (FNA) biopsies obtained from January 2020 to March 2021, at Mount Sinai Hospital, Toronto, Ontario, Canada. Data were analyzed from June 20, 2022, to October 15, 2023. Exposures Quantitative detection of interpatient disparities of RAS variants (ie, NRAS, HRAS, and KRAS) was performed along with assessment of BRAF V600E and TERT promoter variants (C228T and C250T) by detecting their variant allele fractions (VAFs) using digital polymerase chain reaction assays. Main Outcomes and Measures Interpatient differences in RAS, BRAF V600E, and TERT promoter variants were analyzed and compared with surgical histopathologic diagnoses. Malignancy rates, sensitivity, specificity, positive predictive values, and negative predictive values were calculated. Results A total of 438 surgically resected thyroid tumor tissues and 249 thyroid nodule FNA biopsies were obtained from 620 patients (470 [75.8%] female; mean [SD] age, 50.7 [15.9] years). Median (IQR) follow-up for patients who underwent FNA biopsy analysis and subsequent resection was 88 (50-156) days. Of 438 tumors, 89 (20.3%) were identified with the presence of RAS variants, including 51 (11.6%) with NRAS, 29 (6.6%) with HRAS, and 9 (2.1%) with KRAS. The interpatient differences in these variants were discriminated at VAF levels ranging from 0.15% to 51.53%. The mean (SD) VAF of RAS variants exhibited no significant differences among benign nodules (39.2% [11.2%]), noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTPs) (25.4% [14.3%]), and malignant neoplasms (33.4% [13.8%]) (P = .28), although their distribution was found in 41.7% of NIFTPs and 50.7% of invasive encapsulated follicular variant papillary thyroid carcinomas (P < .001). RAS variants alone, regardless of a low or high VAF, were significantly associated with neoplasms at low risk of tumor recurrence (60.7% of RAS variants vs 26.9% of samples negative for RAS variants; P < .001). Compared with the sensitivity of 54.2% (95% CI, 48.8%-59.4%) and specificity of 100% (95% CI, 94.8%-100%) for BRAF V600E and TERT promoter variant assays, the inclusion of RAS variants into BRAF and TERT promoter variant assays improved sensitivity to 70.5% (95% CI, 65.4%-75.2%), albeit with a reduction in specificity to 88.8% (95% CI, 79.8%-94.1%) in distinguishing malignant neoplasms from benign and NIFTP tumors. Furthermore, interpatient differences in 5 gene variants (NRAS, HRAS, KRAS, BRAF, and TERT) were discriminated in 54 of 126 indeterminate FNAs (42.9%) and 18 of 76 nondiagnostic FNAs (23.7%), and all tumors with follow-up surgical pathology confirmed malignancy. Conclusions and Relevance This diagnostic study delineated interpatient differences in RAS variants present in thyroid tumors with a variety of histopathological diagnoses. Discrimination of interpatient variabilities in RAS in combination with BRAF V600E and TERT promoter variants could facilitate cytology examinations in preoperative precision malignancy diagnosis among patients with thyroid nodules.
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Affiliation(s)
- Guodong Fu
- Alex and Simona Shnaider Research Laboratory in Molecular Oncology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, Canada
| | - Ronald S Chazen
- Alex and Simona Shnaider Research Laboratory in Molecular Oncology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, Canada
| | - Christina MacMillan
- Alex and Simona Shnaider Research Laboratory in Molecular Oncology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, Canada
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Sinai Health and University of Toronto, Toronto, Ontario, Canada
| | - Ian J Witterick
- Alex and Simona Shnaider Research Laboratory in Molecular Oncology, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, Canada
- Joseph and Mildred Sonshine Family Centre for Head and Neck Diseases, Mount Sinai Hospital, Sinai Health, Toronto, Ontario, Canada
- Department of Otolaryngology-Head and Neck Surgery, Mount Sinai Hospital, Sinai Health and University of Toronto, Toronto, Ontario, Canada
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Matos MDL, Pinto M, Alves M, Canberk S, Gonçalves A, Bugalho MJ, Papoila AL, Soares P. Comparative Cyto-Histological Genetic Profile in a Series of Differentiated Thyroid Carcinomas. Diagnostics (Basel) 2024; 14:278. [PMID: 38337794 PMCID: PMC10855767 DOI: 10.3390/diagnostics14030278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Revised: 01/25/2024] [Accepted: 01/25/2024] [Indexed: 02/12/2024] Open
Abstract
INTRODUCTION Molecular tests can contribute to improve the preoperative diagnosis of thyroid nodules. Tests available are expensive and not adapted to different populations. AIM This study aimed to compare the cyto-histological genetic profile and to evaluate the reliability of molecular tests using ultrasound-guided fine needle aspiration cytology (US-FNAC) in accurately diagnosing differentiated thyroid carcinomas (DTCs) and predicting biologic behavior of papillary thyroid carcinomas (PTCs). MATERIALS AND METHODS The series included 259 patients with paired cyto-histological samples totaling 518 samples. The genetic alterations were analyzed via PCR/Sanger sequencing. The association with clinicopathologic features was evaluated in PTCs. RESULTS/DISCUSSION From the 259 patients included, histologies were 50 (19.3%) benign controls and 209 (80.7%) DTC cases, from which 182 were PTCs; cytologies were 5.8% non-diagnostic, 18.2% benign, 39% indeterminate, and 37.1% malignant. In histology, indeterminate nodules (n = 101) were 22.8% benign and 77.2% malignant. Mutation frequencies in cytology and histology specimens were, respectively, TERTp: 3.7% vs. 7.9%; BRAF: 19.5% vs. 25.1%; and RAS: 11% vs. 17.5%. The overall cyto-histological agreement of the genetic mutations was 94.9%, with Cohen's k = 0.67, and in indeterminate nodules agreement was 95.7%, k = 0.64. The identified mutations exhibited a discriminative ability in diagnosing DTC with a specificity of 100% for TERTp and BRAF, and of 94% for RAS, albeit with low sensitivity. TERTp and BRAF mutations were associated with aggressive clinicopathological features and tumor progression in PTCs (p < 0.001). The obtained good cyto-histological agreement suggests that molecular analysis via US-FNAC may anticipate the genetic profile and the behavior of thyroid tumors, confirming malignancy and contributing to referring patients to surgery.
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Affiliation(s)
- Maria de Lurdes Matos
- Department of Endocrinology, Diabetes and Metabolismo, Centro Hospitalar Universitário de Lisboa Central, Hospital Curry Cabral, 1050-099 Lisbon, Portugal
| | - Mafalda Pinto
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), i3S—Institute for Research & Innovation in Health, 4200-135 Porto, Portugal; (M.P.); (S.C.)
| | - Marta Alves
- Gabinete de Estatística do Centro de Investigação do Centro Hospitalar Universitário de Lisboa Central, EPE, Nova Medical School, 1169-045 Lisbon, Portugal; (M.A.); (A.L.P.)
- Centro de Estatística e Aplicações da Universidade de Lisboa (CEAUL), 1749-016 Lisbon, Portugal
| | - Sule Canberk
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), i3S—Institute for Research & Innovation in Health, 4200-135 Porto, Portugal; (M.P.); (S.C.)
| | - Ana Gonçalves
- Department of Pathology, Centro Hospitalar Universitário de São João, 4200-319 Porto, Portugal;
| | - Maria João Bugalho
- Department of Endocrinology, Centro Hospitalar Universitário de Lisboa Norte, Hospital de Santa Maria, 1649-028 Lisboa, Portugal;
- Medical Faculty, University of Lisbon, 1649-028 Lisboa, Portugal
| | - Ana Luísa Papoila
- Gabinete de Estatística do Centro de Investigação do Centro Hospitalar Universitário de Lisboa Central, EPE, Nova Medical School, 1169-045 Lisbon, Portugal; (M.A.); (A.L.P.)
- Centro de Estatística e Aplicações da Universidade de Lisboa (CEAUL), 1749-016 Lisbon, Portugal
| | - Paula Soares
- Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), i3S—Institute for Research & Innovation in Health, 4200-135 Porto, Portugal; (M.P.); (S.C.)
- Medical Faculty, University of Porto, 4200-135 Porto, Portugal
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Lebrun L, Salmon I. Pathology and new insights in thyroid neoplasms in the 2022 WHO classification. Curr Opin Oncol 2024; 36:13-21. [PMID: 37975316 PMCID: PMC10715705 DOI: 10.1097/cco.0000000000001012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
PURPOSE OF REVIEW The assessment of thyroid nodules is a common clinical problem, linked to the high incidence of thyroid nodules in the population and the low incidence of aggressive thyroid carcinoma. The screening is therefore one of the strengths of our patient care. Recently, the 2023 Bethesda System for Reporting Thyroid Cytopathology (TBSRTC) and 2022 WHO classification of thyroid neoplasms have been released based on the definition of new entities and the growing impact of molecular testing. The aim of this review is to analyze how these upgrades can help us in the daily routine practice diagnosis of thyroid cancer. RECENT FINDINGS Our review is focused on the most frequent thyroid tumors derived from thyroid follicular cell. Fine needle aspiration (FNA) is the gold standard for the screening of thyroid nodules with very high levels of sensitivity and specificity. These sensitivity and specificity are improved by molecular testing, which refines the risk of malignancy. The 2023 TBSRTC integrates molecular data and the upgrades integrated in the 2022 WHO classification such as the 'low-risk neoplasms' and the 'high-grade follicular-cells derived carcinoma'. The morphological examination remains crucial since the capsular and/or vascular invasion are key features of malignancy in the follicular thyroid neoplasms. Low-risk neoplasms represent a clinical challenge since no specific guidelines are available. Challenges remain regarding oncocytic thyroid lesions, which are not associated with specific diagnostic molecular biomarkers. Molecular testing can help not only in deciphering the prognosis but also in the targeted therapeutic strategy. SUMMARY While molecular testing has succeeded to substantially improve the pre and postoperative diagnosis and risk stratification of thyroid tumors, the morphological examination is still central in the daily routine diagnosis of thyroid pathology. Future is the integrated diagnosis of clinical, morphological, molecular and epigenetic features with the help of artificial intelligence algorithms.
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Affiliation(s)
- Laetitia Lebrun
- Université Libre de Bruxelles (ULB), Hôpital Universitaire de Bruxelles (HUB), CUB Hôpital Erasme, Erasme University Hospital, Department of Pathology, Brussels
| | - Isabelle Salmon
- Université Libre de Bruxelles (ULB), Hôpital Universitaire de Bruxelles (HUB), CUB Hôpital Erasme, Erasme University Hospital, Department of Pathology, Brussels
- DIAPath, Center for Microscopy and Molecular Imaging (CMMI), ULB, Gosselies, Belgium
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Ma T, Wang L, Zhang X, Shi Y. A clinical and molecular pathology prediction model for central lymph node metastasis in cN0 papillary thyroid microcarcinoma. Front Endocrinol (Lausanne) 2023; 14:1075598. [PMID: 36817603 PMCID: PMC9932534 DOI: 10.3389/fendo.2023.1075598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 01/23/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The frequency of thyroid cancer has rapidly increased in recent years globally. Thus, more papillary thyroid microcarcinoma (PTMC) patients are being diagnosed, including clinical lymph node-negative (cN0) patients. Our study attempted to develop a prediction model for assessing the probability of central lymph node metastasis (CLNM) in cN0 PTMC patients. METHODS A total of 595 patients from the Affiliated Hospital of Qingdao University (training cohort: 456 patients) and the Affiliated Hospital of Jining Medical University (verification cohort: 139 patients) who underwent thyroid surgery between January 2020 and May 2022 were enrolled in this study. Their clinical and molecular pathology data were analyzed with multivariate logistic regression to identify independent factors, and then we established a prediction model to assess the risk of CLNM in cN0 PTMC patients. RESULTS Multivariate logistic regression analysis revealed that sex, Hashimoto's thyroiditis (HT), tumor size, extrathyroidal extension, TERT promoter mutations and NRAS mutation were independent factors of CLNM. The prediction model demonstrated good discrimination ability (C-index: 0.757 and 0.753 in the derivation and validation cohorts, respectively). The calibration curve of the model was near the optimum diagonal line, and decision curve analysis (DCA) showed a noticeably better benefit. CONCLUSION CLNM in cN0 PTMC patients is associated with male sex, tumor size, extrathyroidal extension, HT, TERT promoter mutations and NRAS mutation. The prediction model exhibits good discrimination, calibration and clinical usefulness. This model will help to assess CLNM risk and make clinical decisions in cN0 PTMC patients.
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Affiliation(s)
- Teng Ma
- Department of Thyroid Surgery, Affiliated Hospital of Jining Medical University, Jining, Shandong, China
- Qingdao Medical College, Qingdao University, Qingdao, Shandong, China
| | - Lulu Wang
- Department of Cardiovascular Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
| | - Xueyan Zhang
- Qingdao Medical College, Qingdao University, Qingdao, Shandong, China
| | - Yafei Shi
- Department of Thyroid Surgery, Affiliated Hospital of Jining Medical University, Jining, Shandong, China
- *Correspondence: Yafei Shi,
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Emerging Biomarkers in Thyroid Practice and Research. Cancers (Basel) 2021; 14:cancers14010204. [PMID: 35008368 PMCID: PMC8744846 DOI: 10.3390/cancers14010204] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/17/2021] [Accepted: 12/29/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary Tumor biomarkers are molecules at genetic or protein level, or certain evaluable characteristics. These help in perfecting patient management. Over the past decade, advanced and more sensitive techniques have led to the identification of many new biomarkers in the field of oncology. A knowledge of the recent developments is essential for their application to clinical practice, and furthering research. This review provides a comprehensive account of such various markers identified in thyroid carcinoma, the most common endocrine malignancy. While some of these have been brought into use in routine patient management, others are novel and need more research before clinical application. Abstract Thyroid cancer is the most common endocrine malignancy. Recent developments in molecular biological techniques have led to a better understanding of the pathogenesis and clinical behavior of thyroid neoplasms. This has culminated in the updating of thyroid tumor classification, including the re-categorization of existing and introduction of new entities. In this review, we discuss various molecular biomarkers possessing diagnostic, prognostic, predictive and therapeutic roles in thyroid cancer. A comprehensive account of epigenetic dysregulation, including DNA methylation, the function of various microRNAs and long non-coding RNAs, germline mutations determining familial occurrence of medullary and non-medullary thyroid carcinoma, and single nucleotide polymorphisms predisposed to thyroid tumorigenesis has been provided. In addition to novel immunohistochemical markers, including those for neuroendocrine differentiation, and next-generation immunohistochemistry (BRAF V600E, RAS, TRK, and ALK), the relevance of well-established markers, such as Ki-67, in current clinical practice has also been discussed. A tumor microenvironment (PD-L1, CD markers) and its influence in predicting responses to immunotherapy in thyroid cancer and the expanding arena of techniques, including liquid biopsy based on circulating nucleic acids and plasma-derived exosomes as a non-invasive technique for patient management, are also summarized.
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Gilani SM, Abi-Raad R, Garritano J, Cai G, Prasad ML, Adeniran AJ. RAS mutation and associated risk of malignancy in the thyroid gland: An FNA study with cytology-histology correlation. Cancer Cytopathol 2021; 130:284-293. [PMID: 34847284 DOI: 10.1002/cncy.22537] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Activating point mutations of the RAS gene (NRAS, HRAS, and KRAS) can be seen in benign and malignant thyroid tumors; among these, NRAS mutations are more commonly seen. This study was conducted to evaluate the thyroid risk of malignancy (ROM) associated with RAS mutations in thyroid fine-needle aspiration (FNA) at the authors' institution. METHODS The authors searched their electronic database system between January 2015 and May 2021 for thyroid FNA cases with any type of RAS mutation. Molecular alterations were identified with the ThyroSeq Genomic Classifier, ThyGeNEXT (thyroid oncogene panel)/ThyraMIR (miRNA classifier), or ThyroSure gene panel. RESULTS A total of 127 cases (age, 51 ± 14 years; 100 females and 27 males) were identified, and 72 had histologic follow-up. The overall ROM associated with RAS mutations (with or without any other molecular alterations) was 29%, whereas the ROM was lower (18%) with RAS mutations only. Isolated NRAS, HRAS, and KRAS mutation-associated ROMs were 15%, 27%, and 14%, respectively. Among these RAS-mutated cases, the cases with a Bethesda category IV cytologic diagnosis had a higher ROM than the cases with a category III diagnosis (38% vs 17%). Twenty-one histologically confirmed malignant cases were mostly classified on cytology as category IV lesions (14 of 34; 41%), and the remainder were either category III (6 of 35; 17%) or V lesions (1 of 1; 100%). CONCLUSIONS This study demonstrated that the overall RAS mutation-associated ROM in thyroid FNA was intermediate (29%), and isolated HRAS mutations appeared to have a higher ROM (27%) than NRAS and KRAS mutations (15% and 14%, respectively).
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Affiliation(s)
- Syed M Gilani
- Department of Pathology, Yale School of Medicine, New Haven, Connecticut
| | - Rita Abi-Raad
- Department of Pathology, Yale School of Medicine, New Haven, Connecticut
| | - James Garritano
- Medical Scientist Training Program, Yale School of Medicine, New Haven, Connecticut.,Applied Mathematics Program, Yale University, New Haven, Connecticut
| | - Guoping Cai
- Department of Pathology, Yale School of Medicine, New Haven, Connecticut
| | - Manju L Prasad
- Department of Pathology, Yale School of Medicine, New Haven, Connecticut
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Abstract
The molecular signatures of many thyroid tumors have been uncovered. These discoveries have translated into clinical practice and are changing diagnostic and tumor classification paradigms. Here, the findings of recent studies are presented with special emphasis on how molecular insights are impacting the understating of RAS mutant thyroid nodules, Hürthel cell neoplasms, and unusual thyroid tumors, such as hyalinizing trabecular tumor, secretory carcinoma of the thyroid, and sclerosing mucoepidermoid carcinoma with eosinophilia. In addition, the utility of detecting actionable molecular alterations by immunohistochemistry in advanced and aggressive thyroid cancer is also discussed.
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Affiliation(s)
- Juan C Hernandez-Prera
- Department of Pathology, Moffitt Cancer Center, 12902 Magnolia Drive, Tampa, Florida 33612, USA.
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10
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Kim H, Kwon HJ, Kim ES, Kwon S, Suh KJ, Kim SH, Kim YJ, Lee JS, Chung JH. Comparison of the Predictive Power of a Combination versus Individual Biomarker Testing in Non-Small Cell Lung Cancer Patients treated with immune checkpoint inhibitors. Cancer Res Treat 2021; 54:424-433. [PMID: 34237208 PMCID: PMC9016300 DOI: 10.4143/crt.2021.583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/06/2021] [Indexed: 11/21/2022] Open
Abstract
Purpose Since tumor mutational burden (TMB) and gene expression profiling (GEP) have complementary effects, they may have improved predictive power when used in combination. Here, we investigated the ability of TMB and GEP to predict the immunotherapy response in patients with non–small cell lung cancer (NSCLC) and assessed if this combination can improve predictive power compared to that when used individually. Materials and Methods This retrospective cohort study included 30 patients with NSCLC who received immune checkpoint inhibitors (ICI) therapy at the Seoul National University Bundang Hospital. programmed cell death-ligand-1 (PD-L1) protein expression was assessed using immunohistochemistry, and TMB was measured by targeted deep sequencing. Gene expression was determined using NanoString nCounter analysis for the PanCancer IO360 panel, and enrichment analysis were performed. Results Eleven patients (36.7%) showed a durable clinical benefit (DCB), whereas 19 (63.3%) showed no durable benefit (NDB). TMB and enrichment scores (ES) showed significant differences between the DCB and NDB groups (p=0.044 and p=0.017, respectively); however, no significant correlations were observed among TMB, ES, and PD-L1. ES was the best single biomarker for predicting DCB (area under the curve [AUC], 0.794), followed by TMB (AUC, 0.679) and PD-L1 (AUC, 0.622). TMB and ES showed the highest AUC (0.837) among other combinations (AUC [TMB and PD-L1], 0.777; AUC [PD-L1 and ES], 0.763) and was similar to that of all biomarkers used together (0.832). Conclusion The combination of TMB and ES may be an effective predictive tool to identify patients with NSCLC patients who would possibly benefit from ICI therapies.
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Affiliation(s)
- Hyojin Kim
- Department of Pathology; Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Hyun Jung Kwon
- Department of Pathology; Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Eun Sun Kim
- Department of Pathology; Seoul National University Bundang Hospital, Seongnam, Korea
| | - Soohyeon Kwon
- Department of Pathology; Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
| | - Kyoung Jin Suh
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Se Hyun Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yu Jung Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jong Seok Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jin-Haeng Chung
- Department of Pathology; Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Pathology, Seoul National University College of Medicine, Seoul, Korea
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