Meaning letters in TCGA sample barcode field

Question

[Folder40g]

Hi, I've a doubt for which I've no answer.

The fourth field of the TCGA barcode contains the information about the sample, either primary tumor, metastatic, etc

For instance TCGA-93-A4JP-01A-11H-A24S-13, this is a primary tumor, but what does the A next to the 02 means? Sometimes I've sen other letter than A such C, E...

Thanks

Answer 1

[Kevin Blighe]

Edit April 6th, 2020:

Since I posted this answer, this page seems to have come online: TCGA Barcode

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TCGA Barcode

Code tables

Go here for the code tables for further in depth details:

• https://gdc.cancer.gov/resources-tcga-users/tcga-code-tables

Kevin

[Folder40g]

Thanks I was trying to get that image.

[Kevin Blighe]

Yes, the page is no longer accessible. I saved a copy on my GitHub account, though: https://github.com/kevinblighe/TCGAbarcode