Multidisciplinary team meetings are a current international practice in cancer care, but to date, few data exist on the specificity of its practice in hematology.In this manuscript, we present the result of the first national study, realized with quantitative and qualitative methods in France, which brings new insights in order to improve the collegial decision-making process.To improve the effectiveness of MDTMs, the needs to focus on complex cases, to enhance patient centeredness and teamwork are relevant aspects, and a specific focus on hematological particularities is warranted to truly improve process.Background Understanding the Multidisciplinary team meetings (MDTMs) process in different medical specialties facilitates the identification of core factors supporting effective MDTM work. Our mixed-methods study explores the participants’ perceptions of hematology MDTMs.Design Online questionnaires collected data concerning the decision-making process, benefits and inconveniences of MDTMs for both patients and professionals. Semi-directive phone interviews were conducted and analyzed, thereby supplying qualitative data.Results A total of 205 professionals responded to the questionnaire and 22 participated in the qualitative interviews. The data indicate the unique characteristics of hematology, including a specific definition of collegiality, the frequent solicitation of expert advice and the anticipation of treatment even prior to the occurrence of MDTMs. Additional information concerning patients’ wishes and psychosocial conditions are also needed. Participants emphasize the subjective aspects and the impact of the climate of MDTMs on medical decisions.Conclusion Although MDTMs are recognized to be a valuable tool, organizational and relational issues may interfere with their efficiency.To improve the effectiveness of MDTMs, the needs to focus on complex cases, to enhance patient centeredness and teamwork are relevant aspects. A specific focus on hematological particularities might be warranted to truly improve the collegial decision-making process in the context of hematology.