greehey children's cancer research institute greehey children's cancer research institute the greehey children's cancer research institute is a research center in san antonio, texas, us. greehey ccri is a part of the uthscsa.the institute was established in 1999 under a $200,000,000 endowment from the state of texas tobacco settlement, at the time the largest single oncology endowment in us history. the $50 million facility was completed in 2004. the facility is part of the university of texas health science center at san antonio.