“P82 | PROINFLAMMATORY BONE MARROW NICHES AND NEUTROPHIL ACTIVATION ARE ASSOCIATED WITH TIGIT EXPRESSION IN MULTIPLE MYELOMA: V. Velardi1, F. Arciprete1, V. Tomarchio2, G. Vivacqua1, M.A. Tafuri2, M. Di Cecca2, L. Rigacci2, A. Crescenzi3, R. Rana1, O. Annibali2, M. Zingariello1 | 1Unit of Microscopic and Ultrastructural Anatomy, University Campus Bio-Medico, Rome, Italy; 2Unit of Hematology, Stem Cell Transplantation, University Hospital Campus Bio-Medico Rome, Italy; 3Department of Radiological, Oncological, and Pathological Sciences, Sapienza University of Rome, Rome, Italy” (2025) European Journal of Histochemistry, 69(s2). doi:10.4081/ejh.2025.4408.