Severe Congenital Neutropenia 3, also known as kostmann syndrome, is related to neutropenia, severe congenital, 3, autosomal recessive and severe congenital neutropenia. An important gene associated with Severe Congenital Neutropenia 3 is HAX1 (HCLS1 Associated Protein X-1), and among its related pathways/superpathways are Potassium Channels and Other interleukin signaling. The drugs Fludarabine and Melphalan have been mentioned in the context of this disorder. Affiliated tissues include bone marrow and neutrophil, and related phenotypes are immune system and hematopoietic system