Depending on variants, we compiled results obtained from mutated tumour tissue and comprising SDHB±SDHA immunohistochemistry (n=75), LOH detection (n=26), transcriptomic clustering (n=24), cDNA analysis (n=15), western blot analysis (n=7) and measurement of SDH enzymatic activity (n=6) (online supplemental table 2 and figure 1). Here, SDHB is linked to neoplasm.