Dear List, I am looking for a method or package to use RNA-Seq or microarray data to detect genes whose expression in a single or small number of tissues is significantly different than in other tissues. For example, I have an RNASeq data in platelet cell. How can I find a list of genes specifically expressed in platelet by comparing to the Illumina Boby Map RNAseq data which includes 16 tissues/cells. Many thanks, Shirley