Testing the Addition of Pedmark to Cisplatin Chemotherapy for Reducing Drug-Induced Ear Damage in Men With Stage II-III Metastatic Testicular Germ Cell Tumors

Inclusion Criteria: * Documented informed consent of the participant and/or legally authorized representative * Assent, when appropriate, will be obtained per institutional guidelines * Willing and able to sign informed consent form * Willing and able to participate in baseline and serial audiometry exams * Age: ≥ 18 years * Eastern Cooperative Oncology Group (ECOG) of 0 or 1 or Karnofsky score ≥ 70 * Histologically confirmed germ cell tumor (seminoma or non-seminoma) * Presence of metastatic disease (stage II or III) * Fully recovered from the acute toxic effects (except alopecia) to ≤ grade 1 to prior anti-cancer therapy * Receiving first or second line cisplatin-based chemotherapy * Planned cumulative cisplatin dose of ≥ 300mg/m\^2 (including previous treatment) * Measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 * Absolute neutrophil count (ANC) ≥ 1,500/mm\^3 * Platelets ≥ 100,000/mm\^3 * NOTE: Platelet transfusions are not permitted within 14 days of platelet assessment unless cytopenia is secondary to disease involvement * Hemoglobin ≥ 9g/dL * NOTE: Red blood cell transfusions are not permitted within 14 days of hemoglobin assessment unless cytopenia is secondary to disease involvement * Total bilirubin ≤ 1.5 X upper limit of normal (ULN) * Patients with known Gilbert disease who have serum bilirubin level \< 3 x ULN may be enrolled * Aspartate aminotransferase (AST) ≤ 3.0 x ULN * Alanine aminotransferase (ALT) ≤ 3.0 x ULN * C…