Characteristics of germline mutations in Korean patients with pheochromocytoma/paraganglioma

Journal of Medical Genetics
Jung Hee KimMoon-Woo Seong

Abstract

Pheochromocytomas and paragangliomas (PPGLs) are catecholamine-producing neuroendocrine tumours. PPGLs are a rare but important cause of secondary hypertension owing to their high morbidity and mortality. Patients with PPGL exhibit an increased prevalence of mutations in one of the PPGL susceptibility genes according to previous studies. We aimed to investigate the characteristics of germline mutations in the largest number of Korean patients with PPGL. In this study, 161 patients with PPGL were evaluated. Phenotype data, including biochemical, pathological and anatomical imaging results, were collected. Germline mutations in 10 PPGL-related genes were tested by targeted next-generation sequencing (NGS), Sanger sequencing and multiplex ligation-dependent probe amplification. Approximately 21% of apparently sporadic PPGLs harboured germline mutations of the PPGL-related genes. The mutation carriers were younger at the first diagnosis and had more bilateral (28.6% vs 4.0%, p<0.001) and multifocal (11.4% vs 1.6%, p=0.027) PPGLs, but showed no metastatic risk (17.1% vs 11.1%, p=0.504), than non-mutation carriers. Missense mutation of SDHD p.V111I was found in this cohort of Asian patients, which was associated with unilateral pheoc...Continue Reading

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