Abstract
Background: Immune checkpoint immunotherapy (CPI) targeting programmed cell death 1 (PD-1)/ligand (PD-L1) has been shown to be an effective treatment for gestational trophoblastic neoplasia (GTN). This includes those with multidrug resistance, ultra-high-risk disease, and epithelioid trophoblastic tumour/placental site trophoblastic tumour subtypes that are inherently chemotherapy resistant, but there is also
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