SDHAF2 (PGL2-SDH5) and Hereditary Head and Neck Paraganglioma

Abstract
Purpose: Hereditary head and neck paraganglioma (HNPGL) syndromes are associated with mutations in the SDHD(PGL1), SDHC(PGL3), and SDHB(PGL4) genes encoding succinate dehydrogenase subunits. We recently described mutations in a previously uncharacterized human gene, now called SDHAF2, and showed that this was the long-sought “imprinted” PGL2 gene. Here, we present a new branch of the Dutch SDHAF2 (PLG2-SDH5) family.