FN1 and neoplasm: Comparing the percentage relative abundance of different Fusobacterium species between paired tumour and adjacent normal tissue (n = 62 patients), we observed that Fn was the only Fusobacterium species significantly enriched in tumour tissue compared to adjacent normal (Fig. 5a and Supplementary Table 19), supportive of previous reports2,60 (t-test, paired, P = 0.0022).