although an etiological role of c-type rna virus has not yet been demonstrated in human cancer , studies of the interaction of viral and host-cell genomes in mice and other species , and the visualization of c-type virus in human tumors have provided good reasons for suspecting the presence in man of oncogenic genes ( oncogenes ) homologous to those of the c-type viral genomes , which are well studied in mice , hamsters , cats , rats , and chickens .
C0006826
cancer
C0027651
tumors