“P24 | DEVELOPMENT OF HEAD AND NECK SQUAMOUS CELL CARCINOMA PATIENT-DERIVED XENOGRAFTS (PDXS) AND ORGANOIDS (PDXOS) FOR MORPHOLOGICAL ANALYSIS AND DRUG SCREENING: A. Francia1, C. Girone1, D.M. Filippini2, G. Querzoli3, M. Fermi4, S. Venturoli5, A. Degiovanni6, C. Miroglio1, E. Montacci1, A. Ardizzoni7, M. Lauriola8, D. Romaniello8 | 1Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; 2Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; Division of Medical Oncology, IRCCS; Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; 3Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; Pathology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; 4Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; Department of Otorhinolaryngology-Head and Neck Surgery, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; 5Microbiology Unit, IRCCS Azienda Ospedaliero-Universitaria of Bologna, Bologna, Italy; 6Pathology Unit, IRCCS Azienda Ospedaliero Universitaria di Bologna,Bologna, Italy; 7Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; Division of Medical Oncology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy; 8Department of Medical and Surgical Sciences, University of Bologna, Bologna, Italy; IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy” (2025) European Journal of Histochemistry, 69(s2). doi:10.4081/ejh.2025.4344.