title: Myeloproliferative neoplasms in five multiple sclerosis patients.
abstract: The concurrence of myeloproliferative neoplasms (MPNs) and multiple sclerosis (MS) is unusual. We report five patients from a localized geographic area in Denmark with both MS and MPN; all the patients were diagnosed with MPNs in the years 2007-2012. We describe the patients' history and treatment. A potential link between MS and MPNs has not been previously recognized. This observation calls attention to potential environmental factors and/or previously unrecognized genetic factors predisposing these patients to both MS and MPNs.
authors.affiliation: Department of Hematology, Roskilde Hospital, University of Copenhagen, Denmark.
authors.forename: Sigrun
authors.initials: S
authors.lastname: Thorsteinsdottir
authors.affiliation: Department of Hematology L, Rigshospitalet, University of Copenhagen, Denmark.
authors.forename: Ole Weis
authors.initials: OW
authors.lastname: Bjerrum
authors.affiliation: Department of Hematology, Roskilde Hospital, University of Copenhagen, Denmark.
authors.forename: Hans Carl
authors.initials: HC
authors.lastname: Hasselbalch
keywords: Essential thrombocythemia; Interferon; Multiple sclerosis; Myelofibrosis; Polycythemia vera