The median duration of response was 4.2 months (126 days, range: 42 -258 days; 95% CI: 86-147). Median progression-free survival (PFS) was 2.6 months (79 days, range: 1*-397 days), and the median overall survival (OS) rate was 10.3 months (315 days, range: 19-604 days; 95% CI: 279-350). The six-month PFS and OS rates were 16.0% (95% CI: 8.6-17.0) and 72.3%, respectively (95% CI: 66.9-77.6).
The safety analysis included all 291 patients who received treatment with eribulin mesylate. Patients with up to Grade 2 peripheral neuropathy were included in the study. The most frequently reported Grade 3 (severe) or Grade 4 (disabling or life- threatening) adverse events were neutropenia (a decrease in the number of granular white blood cells, 54%); febrile neutropenia, 5.5%, leukopenia (low white blood cell count, 14%), and weakness/fatigue (10%; no Grade 4 events). Grade 3 peripheral neuropathy (a functional disturbance or damage to nerves outside the brain and spinal cord) was reported in 5.5% of patients. No Grade 4 peripheral neuropathy events were reported. No correlation was seen between Grade 2 peripheral neuropathy and deterioration.
"In this study, eribulin mesylate appeared to have an acceptable tolerability profile, particularly with regard to the low incidence of peripheral neuropathy," noted Vahdat. "None of the reported cases of neuropathy were disabling, suggesting that eribulin mesylate, if approved, may be a useful addit
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