Nerve Excitability in Cisplatin-Induced Peripheral Neuropathy

Inclusion Criteria Cohort A: * Adults age ≥ 18 who will begin cisplatin-based chemotherapy either alone or in combination with other agents that are not known to cause neuropathy. * Participants must have adequate hematologic parameters to allow chemotherapy. Exclusion Criteria Cohort A: * Pre-existing peripheral neuropathy; * Family history of a genetic/familial neuropathy; * Any contraindication for treatment with cisplatin as determined by their primary oncologist; * Chemotherapy regimen combining cisplatin with another known chemotherapy agent that may cause peripheral neuropathy; * Patients with cardiac or spinal stimulating devices; * Women who are pregnant or breastfeeding; * Adults with impaired consent capacity as patients must be able to fill out questionnaires regarding their neuropathy symptoms; * Other medical conditions that in the opinion of the treating physician would make the protocol unreasonably hazardous for the patient; * Patients not considered to be able to comply with the protocol. Inclusion Criteria Cohort B: * Adults age ≥ 18 with a diagnosis of cis-PN. * The last dose of cisplatin must be ≥ 3 months prior to study enrollment. Patients who may have been previously enrolled in Cohort A of this study are eligible to participate in Cohort B if they continue to have cis-PN symptoms 3 months after completion of cisplatin therapy. Exclusion Criteria Cohort B: * Pre-existing peripheral neuropathy; * Family history of a genetic/familiar neuropathy; * History of cisplatin-based regimen combining cisplatin with another known chemotherapy agent that may cause peripheral neuropathy; * Patients with cardiac or spinal stimulating devices; * Women who are pregnant or breastfeeding; * Adults with impaired consent capacity as patients must be able to fill out questionnaires regarding their neuropathy symptoms; * Other medical conditions that in the opinion of the treating physician would make the protocol unreasonably hazardous for the patient; * Patients not considered to be able to comply with the protocol.