New Prognostic Index for Neoadjuvant Chemotherapy Outcome in Patients With Advanced High-grade Serous Ovarian Cancer

For pathological evaluation, the omental specimens resected during the IDS were stained with haematoxylin and eosin (H\&E) and reviewed independently by two gynecologic pathologists, both blinded to the clinical data and each other's results. The pathology slide obtained from omentum, usually the site with the most viable tumor, was selected for CRS assessment according to the three-tiered CRS system recommended by 2019 ESMO ovarian cancer guidelines

The routine blood tests and tumor marker measurements, including CA125, HE4, and inflammation-related serum biomarkers including neutrophils, lymphocytes, monocytes, fibrinogen, and platelets, were conducted within three days before the first NACT.