we have determined the prevalence of amplification of c-myc , n-myc , l-myc , h-ras , ki-ras , and n-ras oncogenes in 23 cases of squamous cell carcinoma of the oral cavity , using southern hybridization analysis of dna extracted from the primary tumor tissues .
C1705572
h-ras
C0585362
of squamous cell carcinoma