MGAM and cancer: Hence, we identified 7 MG species associated with both a cancer -free status and with a more favorable prognosis, in case of cancer (mostly N- and/or TNM staging I) in post-CT specimen, such as C. comes and C. catus, Collinsella aerofaciens, E. rectale, M. smithii, or MG recovered in both pre- and post- CT feces (such as B. crossotus, C. aerofaciens) (Fig. 2B).