FM in the context of chemotherapy means a chemotherapy regimen used as first-line therapy in indolent lymphomas. In combination with rituximab it is called R-FM or RFM or FM-R or FMR.
The [R]-FM regimen consists of:
This regimen is also sometimes used in some autoimmune disorders that are inherently sensitive to rituximab, fludarabine and mitoxantrone in monotherapies (e.g. multiple sclerosis).