A new study led by members of the De Marzo lab, and including collaborators from the Prostate Cancer Biorepository Network, reports on important considerations for storage of tissues that will later be used for RNA-based studies. Bottom line, storage of FFPE blocks at room temperature may lead to misleading results, at least for the strength of RNA in situ hybridization signals as assessed in this study. Freezing blocks preserves these signals, and freezing should be considered for samples that may later be used for RNA-based assays. Read the Hopkins Medicine news release here.