X-linked severe congenital neutropenia (MONDO_0010294) can be described as follows. This syndrome is an immunodeficiency syndrome characterized by recurrent major bacterial infections, severe congenital neutropenia, and monocytopenia. It has been described in five males spanning three generations of one family. It is transmitted as an X-linked recessive trait and is caused by mutations in the WAS gene, encoding the WASP protein. Also known as: neutropenia, severe congenital, X-linked, X-linked recessive, severe congenital neutropenia, X-linked.