I would like to download all the available TCGA data on mutations for colon adenocarcinoma, including every sample that was tested under this multi-institutional endeavor, but I cannot figure out how to find the desired information. By visiting the 'searchForTCGAData' page and selecting Data Catgegory: DNA mutation and Disease: COAD I get 384 different results. Do these files correspond to different patients/samples ?
I personally find Broad GDAC Firehose to be the easiest way to access TCGA data, especially if you want it combined: http://gdac.broadinstitute.org/runs/stddata__latest/
Update: UCSC Xena seems to be even better organized and contains more recent data: https://xenabrowser.net/datapages/
You can download the somatic variants in MAF format here: https://tcga-data.nci.nih.gov/tcgafiles/ftp_auth/distro_ftpusers/anonymous/tumor/coad/gsc/hgsc.bcm.edu/illuminaga_dnaseq/mutations/hgsc.bcm.edu_COAD.IlluminaGA_DNASeq.Level_18.104.22.168/hgsc.bcm.edu_COAD.IlluminaGA_DNASeq.1.somatic.maf