The Sample Counts for TCGA Data Report provides a count summary of Sample IDs by Disease Study, Center, Analyte Type, and Platform. Sample counts are provided for Sample IDs a BCR Reported Sending to a Center, Sample IDs the DCC Received from a Center, unaccounted for BCR Sample IDs that a Center Reported, unaccounted for Center Sample IDs that a BCR Reported, and sample ID counts by data level. Links are provided for each positive count that resolve to list of Sample IDs for a specific count. This report is useful for determining how many and which Samples are in the TCGA pipeline. The counts are based on reported IDs either form a BCR or from a GSC/GCC.