Is It Possible to Calculate Microsatellite Instability (MSI) Directly from MAF Files or TCGA Data?

Question

[Jaber]

Greetings,

I'm trying to calculate MSI in tumor samples from TCGA-READ, I have access to MAF files. I would like to determine if it's possible to directly calculate MSI status using MAF files or any other available TCGA datasets.

Appreciate any advice, Thanks