Pilot Study of the Effectiveness of Repetitive Transcranial Magnetic Stimulation on Pain and Quality of Life in Patients with Chemotherapy-Induced Peripheral Neuropathic Pain

Background. Repetitive transcranial magnetic stimulation (rTMS) is a non-invasive technique that acts on the activity of the cerebral cortex employing electrical currents. Aim. The objective of this project is to evaluate the effectiveness of rTMS on pain and quality of life in patients with chemotherapy-induced peripheral neuropathic pain. Method. Ten patients with chemotherapy-induced peripheral neuropathic pain received 20 sessions of rTMS, consisting of 15 minutes of treatment repeated 5 times per week for four weeks (10 Hz, 20s, 30 trains with 81% intensity). Patients were evaluated using the Brief pain inventory (BPI) and the Functional Assessment of Cancer Therapy and neurotoxicity (FACT-GOG-NTX 13). Results. There were significant differences in BPI mean severity, interference score and FACT-GOG-NTX 13 (p<0,05). Conclusion. The pilot study results suggest that rTMS is potentially beneficial for the treatment of chemotherapy-induced peripheral neuropathy. rTMS over the M1 had an important reduction in pain severity, interference with daily activities, and quality of life scores. However, results should be taken with caution due to the small sample size, absence of a control group and short period of follow-up.