title: A case of myeloproliferative neoplasm with a normal complete blood cell count: A novel problem of the JAK2 era.
abstract: The present study reported a case of a myeloproliferative neoplasm (MPN) in a patient with a normal complete blood cell count. Bone marrow biopsy showed bone marrow hyperplasia, an elevated megakaryocyte count, megakaryocytic dysplasia and pleomorphic changes, multiple megakaryocyte clusters and focal reticulin fiber hyperplasia. Furthermore, genetic analysis revealed that the patient was positive for the JAK2-V617F mutation, and negative for the JAK2 exon 12 and 13 mutations and the BCR-ABL (p210) fusion gene. The patient's condition was basically stable and at the time of writing, the patient remained in a stable condition with no specific symptoms of disease. The present study also analyzed the diagnostic and clinical features of MPNs, and a literature review was performed. MPN with a normal complete blood cell count is a rare disease, and attention should be focused on this entity in the clinic.
authors.affiliation: Department of Hematology-Oncology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.
authors.forename: Xiu-Peng
authors.initials: XP
authors.lastname: Ye
authors.affiliation: Department of Hematology-Oncology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.
authors.forename: Shen
authors.initials: S
authors.lastname: Bao
authors.affiliation: Department of Hematology-Oncology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.
authors.forename: Huan-Min
authors.initials: HM
authors.lastname: Gao
authors.affiliation: Department of Hematology-Oncology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of Hematology-Oncology, Ningxia People's Hospital, Yinchuan, Ningxia 750002, P.R. China.
authors.forename: Yu-Ping
authors.initials: YP
authors.lastname: Wei
keywords: JAK2 gene; myeloproliferative neoplasms