{Reference Type}: Case Reports {Title}: Acanthamoeba meningoencephalitis causing secondary hemophagocytic lymphohistiocytosis in an immunocompetent patient: A first case report. {Author}: Chowdhury M;Prakash PR;Singh A;Jorwal P;Das S;Soneja M; {Journal}: J R Coll Physicians Edinb {Volume}: 53 {Issue}: 1 {Year}: 03 2023 20 暂无{DOI}: 10.1177/14782715221149709 {Abstract}: Acanthamoeba is a rare cause of granulomatous amoebic encephalitis (GAE) associated with high mortality. There have been few case reports of Acanthamoeba meningoencephalitis worldwide. Hemophagocytic lymphohistiocytosis (HLH) is a severe hyperinflammatory condition caused by abnormally active macrophages and cytotoxic T lymphocytes; its secondary form is due to infections or malignancies. However, HLH is rather an unknown complication of GAE. We describe an unusual and previously unreported case of Acanthamoeba meningoencephalitis in a young immunocompetent female culminating in secondary HLH.