Ovarian Clear Cell Cancer Is Different: Dual Immunotherapy Signals Promise Study: Phase II Trial of Combination Nivolumab plus Ipilimumab ( PubMed ID: 40608313 / MoST-CIRCUIT) | Access Abstract via PubMed The Bottom Line Ovarian Clear Cell Cancer (OCCC) is a distinct, uncommon type of ovarian cancer—making up about 5% to 10% of cases in Western populations (and up to 15–20% in Asian cohorts). Unlike the more common serous types, clear cell tumours are notoriously resistant to standard platinum-based chemotherapy, leaving advanced cases with a poor 5-year survival rate of ~20%. Driven by unique molecular features—including underlying DNA repair deficiencies—OCCC is an ideal target for personalised immunotherapy. Early data from an Australian-led trial evaluating a dual drug combination (Nivolumab + Ipilimumab) shows encouraging response rates in this hard-to-treat group. Disease Profile & Trial Snapshot The Clinical Hurdle: Clear cell tumours often affect younger women and freque...