Bendamustine in combination with thalidomide and dexamethasone is a viable salvage option in myeloma relapsed and/or refractory to bortezomib and lenalidomide.
Lau I-J., Smith D., Aitchison R., Blesing N., Roberts P., Peniket A., Yong K., Rabin N., Ramasamy K.
Treatment options are limited in myeloma relapsed or refractory to both bortezomib and lenalidomide (double-relapsed/refractory multiple myeloma; DRMM). Bendamustine is an antitumour agent that has efficacy in relapsed myeloma. We retrospectively analysed data from 30 DRMM patients who received a combination of bendamustine, thalidomide and dexamethasone (BTD) in 28-day treatment cycles. Bendamustine was administered with a cumulative dose of up to 200 mg/m(2). Thalidomide (50-150 mg) was given daily as tolerated, and dexamethasone was given at an equivalent dose of up to 160 mg per cycle. A median of 5 (2-9) treatment cycles were administered per patient. Twenty-six patients (87 %) achieved stable disease or better. At a median follow-up time of 12.1 (2.3-21.5) months, median (95 % CI) progression-free survival and overall survival were 4.0 (2.6-5.3) months and 7.2 (5.2-9.2) months, respectively. The most common grade 3-4 adverse events were haematological: anaemia (n = 8, 34.8 %), neutropenia (n = 16, 69.6 %) and thrombocytopenia (n = 10, 43.5 %). Non-haematological toxicities included pain (n = 3, 13.0 %), infection (n = 7, 30.4 %) and sensory neuropathy (n = 1, 4.3 %). We propose that BTD is a viable salvage treatment option for DRMM patients.