0 -> Tumor CancerStemCell -> Tumor Tumor -> 0 0 -> CancerStemCell CancerStemCell -> 0 CytotoxicTcell -> 0 0 -> CytotoxicTcell 0 -> TGFb 0 -> TGFb 0 -> TGFb TGFb -> 0 0 -> IFNy IFNy -> 0 0 -> MHC1 MHC1 -> 0 0 -> MHC1 0 -> MHC2 MHC2 -> 0