Chronic neutrophilic leukemia (CNL) is a rare myeloproliferative neoplasm (MPN) with less than 40 cases of patients being reported or clinically suspected meeting with 2008 World Health Organization (“WHO”) diagnostic criteria. | Coexisting of bone marrow fibrosis dysplasia and an X chromosomal abnormality in chronic neutrophilic leukemia with CSF3R mutation A case report and literature review