Age ≥18 years.

Histologically confirmed epithelial ovarian cancer or primary peritoneal Müllerian carcinoma.

Undergoing standard treatment including surgery and/or systemic therapy.

Availability of plasma samples collected at one or more predefined treatment timepoints (pre-operative, post-operative, and/or post-chemotherapy).

Availability of corresponding clinical and biomarker data (CA125 and/or HE4).

Written informed consent

Longitudinal Plasma Proteomic Remodeling in Ovarian Cancer