A Clinical Trial of Sac-TMT in People With Non-HRD Positive Advanced Ovarian Cancer (MK-2870-021)

Inclusion Criteria

• The main inclusion criteria include but are not limited to the following: - Has histologically confirmed epithelial ovarian, primary peritoneal, or fallopian tube carcinoma of certain histologies. - Has completed primary debulking surgery or interval debulking surgery. - Has completed first-line (1L) platinum-based chemotherapy, with a response of stable disease, partial response, complete response or no evidence of disease per protocol. - Has provided tumor tissue that is not previously irradiated. - If human immunodeficiency virus (HIV) infected, has well-controlled HIV on antiretroviral therapy. - Has undetectable hepatitis B virus (HBV) viral load and received HBV antiviral therapy if hepatitis B surface antigen (HBsAg)-positive. - Has undetectable hepatitis C virus (HCV) viral load if has a history of HCV infection. The main exclusion criteria include but are not limited to the following: - Has nonepithelial cancers, low-grade serous tumors, low-grade endometrioid tumors, borderline tumors. mucinous, seromucinous that is predominantly mucinous, malignant Brenner's tumor, and undifferentiated carcinoma. - Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis. - Has a history of severe eye disease. - Has active inflammatory bowel disease requiring immunosuppressive medication or a previous history of inflammatory bowel disease. - Has uncontrolled, significant cardiovascular disease or cerebrovascular disease. - Has a history of (noninfectious) pneumonitis/interstitial lung disease (ILD), which required steroids, or has current pneumonitis/ILD. - Received prior systemic anticancer therapy, with the exception of the first-line platinum-based chemotherapy required by the inclusion criteria. - Had a live or live-attenuated vaccine within 30 days of randomization. - Has a known additional malignancy that is progressing or required active treatment within the past 3 years. - Has active infection requiring systemic therapy. - Has concurrent and active HBV and HCV infections. - Has HIV infection and a history of Kaposi's sarcoma and/or multicentric Castleman's disease. - Has not recovered from major surgery or has ongoing surgical complications. - Has a homologous recombination deficiency (HRD)-positive, unknown, or inconclusive tumor status as determined by the central laboratory. - Has active or ongoing stomatitis of any grade.