A Complete Response to Combined Immunotherapy in a Patient with an ATM plus SF3B1 Mutation and a Moderate Tumor Mutational Burden with a High-Grade Treatment-Emergent Neuroendocrine Prostate Cancer: Case Report and Review of the Literature.

Introduction: High-grade treatment-emergent neuroendocrine prostate cancer (T-NEPC) is a rare subtype of prostate cancer with limited therapeutic options and poor prognosis. Understanding biomarkers that influence the efficacy of immune checkpoint inhibitors (IO) is vital to form a better therapeutic arsenal for these patients.

Case Presentation: We describe an impressive response to IO combination immunotherapy with ipilimumab plus nivolumab (Ipi/nivo) in a patient with T-NEPC who had failed standard treatment approaches.