Abstract
Intracranial involvement in multiple myeloma is extremely rare. The effect of new drugs (eg, thalidomide, bortezomib, lenalidomide) with respect to old drugs (eg, alkylators, steroids) has not been reported. We collected clinical and biological data of patients presenting with an osteo-dural or primary dural multiple myeloma (OD-DMM) or a central nervous system myelomatosis (CNS-MM) by sending a questionnaire to the centers of the Gruppo Italiano Malattie Ematologiche dell'Adulto (GIMEMA). A total of 50 patients were registered. New therapies were used in 35 patients, whereas 15 patients received old treatments. Twenty-five out of 50 patients obtained a complete remission or a very good partial remission (CR+VGPR). Overall survival (OS) for CNS-MM was 6 months, for OD-DMM 25 months. OS was 25 months for patients treated with new agents versus 8 months with old agents. Improved OS and progression-free survival were predicted by response (CR+VGPR) and by patients who underwent stem cell transplantation versus chemotherapy. β2-Microglobulin >5 mmol/L was a poor prognostic factor. Multivariate analysis showed poor survival for patients with β2-microglobulin >5 mmol/L and better survival for patients achieving CR+VGPR. The overall data highlight the relevance of therapy with new drugs in intracranial myeloma, providing a framework for future clinical trials.
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