I have downloaded the Level_3 data for CNV (SNP Array) for Breast Cancer from the Bulk Download section of TCGA.

The file names look like this:

    MOHEL_p_TCGA_271_274_275_N_GenomeWideSNP_6_A01_1320320.hg18.seg.txt

The data in the "Sample" column within the file is the same.

I was expecting a barcode like `TCGA-A2-A0D0-01`.

How do I match the data to the patient?

Thanks for helping

Stephanie
I think you should download the data using the Data Matrix. When you download the data, you automatically download files like `FILE_SAMPLE_MAP.txt` & `file_manifest.txt`. You will get the barcode along with the filename in these files.