Abstract
Paragangliomas of the head and neck (HNPGL) are rare neurogenic tumors, in which genetic factors play a certain role. So far, 10 genes related to HNPGL (SDHA、SDHB、SDHC、SDHD、SDHAF2、VHL、HIF2A、RET、NF1 and TMEM127) have been found. The clinical phenotypes of different gene mutations are different. SDHD、SDHC and SDHAF2 gene mutations are almost 100% related to HNPGL. SDHD and SDHAF2 gene mutations tend to form multiple paragangliomas, and its genetic pattern has obviously maternal imprinting. SDHB mutations have sympathetic paraganglioma and malignant tendency. Understanding the molecular mechanism and genotype-phenotypic relationship of paraganglioma can provide significant help for genetic counseling, diagnosis and treatment and follow-up strategies in patients with HNPGL.
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