I was looking at the somatic mutation summary at GDC data portal. It seems there are 986 samples with matched tumor and normal SNV data available. For example, # Affected Cases in Cohort for mutation "chr3:g.179234297A>G" is " 121 / 986". However, I only find 356 samples in dbGaP Study Accession: phs000178.v9.p8.
Is there a way to find out the actual number of matched tumor and normal samples in TCGA-BRCA? Your help is greatly appreciated.