A novel XIAP mutation in a Japanese boy with recurrent pancytopenia and splenomegaly

Abstract
X-linked lymphoproliferative syndrome (XLP) is a rare inherited primary immunodeficiency. It is clinically characterized by hemophagocytic lymphohistiocytosis (HLH), which usually develops in response to an Epstein-Barr virus (EBV) infection, dysgammaglobulinemia and malignant lymphoma. Most cases