Exosomal product from GBM had an insertion of one nucleotide between 181713831 and 181713832 in addition to the SNP at 181713919: A > G. In CD133+ GBM derived exosomal PCR product, the SNP was seen at 181713870: A > G, 181713875: T > C, 181713985: A > G and 181714249: T > C. SNP at chr3:181714249 (T>C) / rs1297749385 reported in the NCBI dsSNP database was found only in the CD133+ GBM exosomes. Here, PROM1 is linked to glioblastoma.