Evolution of diagnostic workup and treatment for multiple myeloma 2013 - 2019.

OBJECTIVE Evaluate changes in diagnostic and therapeutic approach in multiple myeloma among Norwegian hematologists in the current decade. METHODS This nationwide study in Norway is based on results of surveys conducted among professionally active hematologists from 2013 to 2019. Every year respondents participating in the survey suggested treatment regimens used in typical clinical situations in patients with multiple myeloma, as well as diagnostic routines. RESULTS The use of regimens containing alkylators and thalidomide was common at the beginning of the studied period. Later, lenalidomide became the most preferred treatment in most first line patients. Bortezomib maintained a stable position in the treatment of myeloma in patients with renal insufficiency. The lenalidomide, bortezomib, and dexamethasone combination became the preferred frontline triplet for transplant ineligible patients and induction therapy before transplant. Nowadays, the relapse after lenalidomide-based treatment is managed using both bortezomib-based therapies and combinations with the newest agents. Together with the therapeutic landscape, the use of diagnostic criteria and work-up as well as supportive care changed in the period influenced by local and international guidelines and recommendations. CONCLUSION Norwegian hematologists gradually adopt new clinical concepts, guidelines, and recommendations in their practice.