Secondary Hemophagocytic Lymphohistiocytosis Following Dostarlimab Treatment in a Patient With Metastatic Endometrial Cancer.

Immunotherapy is a rapidly expanding cancer treatment strategy. Dostarlimab is administered as the first-line treatment for metastatic endometrial cancer in combination with chemotherapy. Herein, we describe the case of a 72-year-old female patient who developed hemophagocytic lymphohistiocytosis after receiving a single dose of 500 mg of dostarlimab.