How to check if genes are important in cancer, using depmap or cBioPortal?

Question

[JACKY]

Following DESeq2 analysis, I have a number of differentialy expressed genes for infected samples vs non-infected with some virus. I want to test if some of those genes are actually correlated somehow with cancer.

I read that cBioPortal or depmap are the way to do it, but I'm having a hard time doing it in R. Any guidance would help greaty.