Abstract
Pembrolizumab is a humanized antibody directed against the programmed death-1 receptor on the cell surface, resulting in a T-cell-mediated immune response against tumor cells that can be complicated by immune-related adverse events. Here we present a novel case of pembrolizumab-induced acquired amegakaryocytic thrombocytopenia (AAT) in a patient with metastatic nasopharyngeal carcinoma. AAT is an incredibly rare and challenging entity for which there is no standardized treatment. We discuss our therapeutic approach using a calcineurin inhibitor and thrombopoietin receptor agonists for successful treatment of AAT and resumption of multiagent cytotoxic chemotherapy.
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