Development and validation of a comprehensive mutation and deletion detection assay for SDHB, SDHC, and SDHD.

ABSTRACT

BACKGROUND: Lack of sequencing validation and complexity of deletion testing hinder genetic diagnosis of SDH-associated paraganglioma/pheochromocytoma. METHODS: We developed sequencing assays and multiplex ligation-dependent probe amplification (MLPA) deletion detection for SDHB, SDHC and SDHD. Clinical performance was validated on 141 blinded samples, previously tested at NIH. RESULTS: Sequencing and deletion detection were highly reproducible and agreed with previous NIH results in 99.3% and 100%, respectively. CONCLUSIONS: DNA sequencing combined with MLPA allows reliable and simplified genotyping of SDHB, SDHC and SDHD.