to determine whether the copy number of the n-myc gene in primitive neuroectodermal tumors of the central nervous system is altered , we examined 20 primitive neuroectodermal tumors by southern and/or slot blot hybridization to a 1-kilobase n-myc genomic dna sequence and a 492-base pair n-myc-specific subclone as well as to a 1.1-kilobase albumin complementary dna sequence as a control for gene copy number .
C1518271
neuroectodermal
C0206663
primitive neuroectodermal tumors