Tools for downloading genome sequence data of a small segment of the genome for all patient in a study case

Question

[regtodo]

Are there some tools for downloading sequence data of a limited small segment (gene, locus) of the sequenced genome for every patient in a TCGA study?

[igor]

Which data (DNA, RNA, methylation, CNV, etc.)? Which specific level of processing?

[regtodo]

DNA sequence data for all patients. To start, I am looking for all variant frequencies at each position in a genome region for every individual.