RT Conference Proceedings T1 A multicenter clinical registry with associated biological samples of gynecological cancer patients: Pilot study of the Spanish Ovarian Cancer Research Group (GEICO 81-T) A1 Lopez-Guerrero, J. A. A1 Mendiola, M. A1 Perez-Fidalgo, J. A. A1 Romero, I. A1 Gomez-Raposo, C. A1 Herrero, A. A1 Alarcon, J. D. A1 Esteban-Esteban, C. A1 Marquina-Ospina, G. A1 Rubio, M. J. A1 Sanchez, L. A1 Guerra, E. M. A1 Gonzalez-Martin, A. K1 Pilot Projects K1 Translational Research, Biomedical K1 Biological Specimen Banks K1 Ascites AB Background: Accurate clinical annotations associated with biological samples are crucial for outcome research on real-world data. This study aims to create a virtual clinical registry (VCR) of gynecological cancer patients, associated with the collection of biological samples through biobanks, to support real-world studies and translational research in Spain. Methods: GEICO VCR is an observational, prospective, multicenter study involving over 60 hospitals, integrating clinical information and biological samples into four cohorts: ovarian cancer (OC), endometrial cancer (EC), cervical cancer (CC), and rare cancers (RC). A pilot study implementing the OC module was conducted in nine centers. Inclusion criteria were: 1) women diagnosed with gynecological cancer since March 2019; 2) age ≥18 years; 3) written informed consent; and 4) access to medical records. Clinical information is collected across seven data sets: Patient data (anonymized), Diagnosis, Primary Surgery, Chemotherapy, Biobank, Recurrence, and Follow-up. Collected samples include formalin-fixed and paraffin-embedded material, fresh frozen tissues, serum and plasma, lymphocytes, and ascites, which are stored at each center’s biobank using a coding system that links the samples to clinical information. PB Elsevier SN 0923-7534 YR 2020 FD 2020 LK https://hdl.handle.net/10668/25338 UL https://hdl.handle.net/10668/25338 LA en NO Guerrero JAL, Mendiola M, Pérez-Fidalgo JA, Romero I, Raposo CG, Herrero A, et al. 854P A multicenter clinical registry with associated biological samples of gynecological cancer patients: Pilot study of the Spanish Ovarian Cancer Research Group (GEICO 81-T). Annals Of Oncology [Internet]. 1 de septiembre de 2020;31:S635-6 DS RISalud RD Sep 7, 2025