Acquired familial Mediterranean fever associated with a somatic MEFV mutation in a patient with JAK2 associated post- polycythemia myelofibrosis

Background A study was designed to identify the source of fever in a patient with post-polycythemia myelofibrosis, associated with clonal Janus Kinase 2 (JAK2) mutation involving duplication of exon 12. The patient presented with 1–2 day long self-limited periodic episodes of high fever that became more frequent as the hematologic disease progressed.