You can use Pan-Cancer Analysis Platform http://starbase.sysu.edu.cn/panCancer.php . It provided expression profiles of ncRNAs (miRNAs, lncRNAs, snoRNAs, pseudogenes, etc.) and protein-coding genes across 32 cancer types ( ~10,000 RNA-seq and ~9,900 miRNA-seq samples) integrated from TCGA project. It also provided survival, differential expression and co-expression analysis platforms for miRNAs and genes (lncRNAs, mRNAs, ncRNAs, pseudogenes, etc.).
If I am using RNA-seq data from Cbio portal only, since its using Illumina, is it like I can put the three genes in querying and change the genomic profile to 366 mRNA expression and only this shows mRNA Expression Z-scores, RSEM (Batch normalized from Illumina HiSeq_RNASeqV2) Enter a z-score threshold ± 2.0. and after that I can get the gene expression of the three genes ? is my understanding correct?
if so what does z-score threshold ± 2.0 have meaning, 2?