University of Texas M. D. Anderson Cancer Center Jul 3 2025 Patients with ovarian clear cell carcinoma (OCCC) whose tumors have specific mutations in the PPP2R1A gene were found to have improved survival following immunotherapy compared to patients without these mutations, according to researchers from The University of Texas MD Anderson Cancer Center.  The findings, published today in Nature , suggest PPP2R1A mutations could be a valuable biomarker to help guide treatment for this difficult-to-