- Clinical Study
- Whole Exome Sequencing Identifies Novel Genetic Alterations in Patients with Pheochromocytoma/Paraganglioma
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Soo Hyun Seo, Jung Hee Kim, Man Jin Kim, Sung Im Cho, Su Jin Kim, Hyein Kang, Chan Soo Shin, Sung Sup Park, Kyu Eun Lee, Moon-Woo Seong
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Endocrinol Metab. 2020;35(4):909-917. Published online December 23, 2020
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DOI: https://doi.org/10.3803/EnM.2020.756
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 Abstract
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- Background
Pheochromocytoma and paragangliomas (PPGL) are known as tumors with the highest level of heritability, approximately 30% of all cases. Clinical practice guidelines of PPGL recommend genetic testing for germline variants in all patients. In this study, we used whole exome sequencing to identify novel causative variants associated with PPGL to improve the detection of rare genetic variants in our cohort.
Methods
Thirty-six tested negative for pathogenic variants in previous Sanger sequencing or targeted gene panel testing for PPGL underwent whole exome sequencing. Whole exome sequencing was performed using DNA samples enriched using TruSeq Custom Enrichment Kit and sequenced with MiSeq (Illumina Inc.). Sequencing alignment and variant calling were performed using SAMtools.
Results
Among previously mutation undetected 36 patients, two likely pathogenic variants and 13 variants of uncertain significance (VUS) were detected in 32 pheochromocytoma-related genes. SDHA c.778G>A (p.Gly260Arg) was detected in a patient with head and neck paraganglioma, and KIF1B c.2787-2A>C in a patient with a bladder paraganglioma. Additionally, a likely pathogenic variant in BRCA2, VUS in TP53, and VUS in NFU1 were detected.
Conclusion
Exome sequencing further identified genetic alterations by 5.6% in previously mutation undetected patients in PPGL. Implementation of targeted gene sequencing consisted of extended genes of PPGL in routine clinical screening can support the level of comprehensive patient assessment.
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Citations
Citations to this article as recorded by  - Patient Sex and Origin Influence Distribution of Driver Genes and Clinical Presentation of Paraganglioma
Susan Richter, Nicole Bechmann
Journal of the Endocrine Society.2024;[Epub] CrossRef - Germline Mutations and Phenotypic Associations in Korean Patients With Pheochromocytoma and Paraganglioma: A Multicenter Study and Literature Review
Kwan Hoon Jo, Jaewoong Lee, Jaeeun Yoo, Hoon Seok Kim, Eun Sook Kim, Je Ho Han, Yi Sun Jang, Jae-Seung Yun, Jang Won Son, Soon Jib Yoo, Seung Hwan Lee, Dong Jun Lim, Hyuk-Sang Kwon, Seungok Lee, Sungdae Moon, Myungshin Kim
Annals of Laboratory Medicine.2024; 44(6): 591. CrossRef - Case Report: Aggressive neural crest tumors in a child with familial von Hippel Lindau syndrome associated with a germline VHL mutation (c.414A>G) and a novel KIF1B gene mutation
Lucie Landen, Anne De Leener, Manon Le Roux, Bénédicte Brichard, Selda Aydin, Dominique Maiter, Philippe A. Lysy
Frontiers in Endocrinology.2023;[Epub] CrossRef - A Case of Pheochromocytoma as a Subsequent Neoplasm in a Survivor of Childhood Embryonal Rhabdomyosarcoma
Rozalyn L. Rodwin, Sanyukta K. Janardan, Erin W. Hofstatter, Nina S. Kadan-Lottick
Journal of Pediatric Hematology/Oncology.2022; 44(2): e585. CrossRef - Mutations of 1p genes do not consistently abrogate tumor suppressor functions in 1p-intact neuroblastoma
Chik Hong Kuick, Jia Ying Tan, Deborah Jasmine, Tohari Sumanty, Alvin Y. J. Ng, Byrrappa Venkatesh, Huiyi Chen, Eva Loh, Sudhanshi Jain, Wan Yi Seow, Eileen H. Q. Ng, Derrick W. Q. Lian, Shui Yen Soh, Kenneth T. E. Chang, Zhi Xiong Chen, Amos H. P. Loh
BMC Cancer.2022;[Epub] CrossRef - A case of juvenile-onset pheochromocytoma with KIF1B p.V1529M germline mutation
Masahiro Nezu, Yosuke Hirotsu, Kenji Amemiya, Miho Katsumata, Tomomi Watanabe, Soichi Takizawa, Masaharu Inoue, Hitoshi Mochizuki, Kyoko Hosaka, Toshio Oyama, Masao Omata
Endocrine Journal.2022; 69(6): 705. CrossRef - Systematic analysis of expression profiles and prognostic significance for MMDS-related iron–sulfur proteins in renal clear cell carcinoma
Ling Yang, Yu-Xin Chen, Ying-Ying Li, Xiao-Juan Liu, Yong-Mei Jiang, Jia Mai
Scientific Reports.2022;[Epub] CrossRef - Diagnosis for Pheochromocytoma and Paraganglioma: A Joint Position Statement of the Korean Pheochromocytoma and Paraganglioma Task Force
Eu Jeong Ku, Kyoung Jin Kim, Jung Hee Kim, Mi Kyung Kim, Chang Ho Ahn, Kyung Ae Lee, Seung Hun Lee, You-Bin Lee, Kyeong Hye Park, Yun Mi Choi, Namki Hong, A Ram Hong, Sang-Wook Kang, Byung Kwan Park, Moon-Woo Seong, Myungshin Kim, Kyeong Cheon Jung, Chan
Endocrinology and Metabolism.2021; 36(2): 322. CrossRef - Recurrent Germline Mutations of CHEK2 as a New Susceptibility Gene in Patients with Pheochromocytomas and Paragangliomas
Yinjie Gao, Chao Ling, Xiaosen Ma, Huiping Wang, Yunying Cui, Min Nie, Anli Tong, Dario De Biase
International Journal of Endocrinology.2021; 2021: 1. CrossRef
- Genetic Landscape and Clinical Manifestations of Multiple Endocrine Neoplasia Type 1 in a Korean Cohort: A Multicenter Retrospective Analysis
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Boram Kim, Seung Hun Lee, Chang Ho Ahn, Han Na Jang, Sung Im Cho, Jee-Soo Lee, Yu-Mi Lee, Su-Jin Kim, Tae-Yon Sung, Kyu Eun Lee, Woochang Lee, Jung-Min Koh, Moon-Woo Seong, Jung Hee Kim
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Received April 9, 2024 Accepted July 24, 2024 Published online November 18, 2024
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DOI: https://doi.org/10.3803/EnM.2024.2008
[Epub ahead of print]
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Abstract
PDFSupplementary MaterialPubReader ePub
- Background
Multiple endocrine neoplasia type 1 (MEN1) is an autosomal dominant disorder characterized by tumors in multiple endocrine organs, caused by variants in the MEN1 gene. This study analyzed the clinical and genetic features of MEN1 in a Korean cohort, identifying prevalent manifestations and genetic variants, including novel variants.
Methods
This multicenter retrospective study reviewed the medical records of 117 MEN1 patients treated at three tertiary centers in Korea between January 2012 and September 2022. Patient demographics, tumor manifestations, outcomes, and MEN1 genetic testing results were collected. Variants were classified using American College of Medical Genetics and Genomics (ACMG) and French Oncogenetics Network of Neuroendocrine Tumors propositions (TENGEN) guidelines.
Results
A total of 117 patients were enrolled, including 55 familial cases, with a mean age at diagnosis of 37.4±15.3 years. Primary hyperparathyroidism was identified as the most common presentation (84.6%). The prevalence of gastroenteropancreatic neuroendocrine tumor and pituitary neuroendocrine tumor (PitNET) was 77.8% (n=91) and 56.4% (n=66), respectively. Genetic testing revealed 61 distinct MEN1 variants in 101 patients, with 18 being novel. Four variants were reclassified according to the TENGEN guidelines. Patients with truncating variants (n=72) exhibited a higher prevalence of PitNETs compared to those with non-truncating variants (n=25) (59.7% vs. 36.0%, P=0.040).
Conclusion
The association between truncating variants and an increased prevalence of PitNETs in MEN1 underscores the importance of genetic characterization in guiding the clinical management of this disease. Our study sheds light on the clinical and genetic characteristics of MEN1 among the Korean population.
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