“PO05 | Intensive FVIII replacement in haemophilia patients with hypertrophic synovium: a randomized study: I.L. Calcaterra1, E. Baldacci2, R. Marino3, F. Valeri4, R.C. Santoro5, G. Pasta6, C. Martinoli7, M. Di Minno1 | 1Department of Clinical Medicine and Surgery, Federico II University, Naples; 2Haematology, University Hospital Policlinico Umberto I, Roma; 3Haemophilia Center and thrombosis, Policlinico, Bari; 4Regional Centre for Haemorrhagic and Thrombotic Diseases, AOU Città Della Salute e Della Scienza; Turin; 5Centre for Hemorrhagic and Thrombotic Disorders, Pugliese Ciaccio Hospital, Catanzaro; 6Fondazione IRCCS San Matteo Hospital, Pavia; 7Department of Health Science DISSAL, University of Genoa, Unit of Radiology and IRCCS San Martino Hospital, Genoa, Italy” (2025) Bleeding, Thrombosis and Vascular Biology, 4(s1). doi:10.4081/btvb.2025.267.