Welcome to TissueLab Cortex! Describe the patient cohort you'd like to assemble and I'll select cases by reading the pathology reports — I cover TCGA-BRCA / TCGA-COAD / TCGA-KIRC / TCGA-KIRP / TCGA-PRAD and will pick the right one from what you say. For example: "I'd like to select 30 TCGA-COAD patients with right-colon tumors, balanced survival events, from diverse hospitals." You can then refine it — e.g. "actually only 20 patients" or "only MSI-H patients". Say "all of them" or "pan-cancer" to pool across every project.