Calling UTRs in TCGA dataset

Question

[Jamie Watson]

I have a list of upstream ORFs in UTR with the start and end position and I have TCGA maf dataset as well. I want to call these uORFs in TCGA dataset. How can I do that? How should the start and end positions intersect? Or should I just find common genes and in both datasets. I have given the links to the two datasets as well.

list of uORFs

TCGA dataset

Insights will be appreciated.