Dengue fever and bone marrow myelofibrosis.

Myelofibrosis is characterized by reticulin and/or collagen fibrosis in the bone marrow stroma resulting in secondary cytopenia. In addition to clonal hematologic neoplasms, myelofibrosis may also develop in association with other clinical conditions, including hematological disorders, solid malignancies, Down syndrome, autoimmune diseases and others. We report the first case to our knowledge of myelofibrosis associated with dengue fever. We briefly describe dengue infections and hypothesize the causes of myelofibrosis in this condition.