Sacituzumab Tirumotecan +/- Pembrolizumab in I/O Exposed Metastatic or Recurrent Ovarian Clear Cell Cancer

This is a phase II, two-arm, noncomparative screening study of Sacituzumab tirumotecan, an intravenous antibody-drug conjugate (ADC) that targets Trop-1, administered alone or in combination with pembrolizumab, a monoclonal antibody to PD-1 in patients with relapsed clear cell cancers that originated in the ovary, fallopian tube or peritoneal cavity, inclusive of endometriosis (collectively referred to as OCCC throughout the protocol) after previous treatment with anti-PD1 therapy. The regimens will be evaluated separately, and the study is not designed or powered to compare the regimens.