Cavalleri A, Mutti S, Sicuranza A, Pacelli P, Leoni A, Ielo C, Paolini L, Mangolini V, Miracapillo T, Turriziani C, Abruzzese E, Farina M, Radeghieri A, Malagola M, Breccia M, Bocchia M, Russo D, Bernardi S. P026 | Tracking residual chronic myeloid leukemia: complementary insights from CD26⁺ stem cells and extracellular BCR::ABL1: A. Cavalleri 1|2, S. Mutti 1|2, A. Sicuranza 3, P. Pacelli 3, A. Leoni 1|2, C. Ielo 4, L. Paolini 5, V. Mangolini 6|7, T. Miracapillo 3, C. Turriziani 3, E. Abruzzese 8, M. Farina 1, A. Radeghieri 6, M. Malagola 1, M. Breccia 4, M. Bocchia 3, D. Russo 1, S. Bernardi 1|2|9 | 1Department of Clinical and Experimental Sciences, Università di Brescia - Unit of Blood Diseases and Bone Marrow Transplant, ASST Spedali Civili; 2Centro di Ricerca Emato-Oncologica AIL, CREA, ASST Spedali Civili; 3University of Siena, Azienda Ospedaliera Universitaria; 4Umberto I Policlinico, La Sapienza University; 5Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, Università di Brescia; 6Department of Molecular and Translational Medicine, Università di Brescia; 7IRCCS Fondazione Don Carlo Gnocchi ONLUS; 8Hematology, S. Eugenio Hospital, ASLRoma2; 9National Center for Gene Therapy and Drugs based on RNA Technology. Haematologica 2026; 111(s1); https://doi.org/10.3324/haematol.2026.s1.97.