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Case Reports in Hematology
Volume 2013 (2013), Article ID 702831, 4 pages
Case Report

A Case of Philadelphia Chromosome Positive Myeloproliferative Neoplasm in a Pregnant Woman with Unusual Primary Myelofibrosis Features

1Division of Hematopathology, Department of Pathology and Laboratory Medicine, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA
2Division of Hematology and Oncology, Department of Internal Medicine, University of Texas Medical Branch, 301 University Boulevard, Galveston, TX 77555, USA

Received 18 April 2013; Accepted 11 May 2013

Academic Editors: S. Aref, K. Kawauchi, K. Nakase, P. Tsirigotis, and S. D. Wagner

Copyright © 2013 Jason Koshy et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Myeloproliferative neoplasms (MPNs) are traditionally separated into BCR-ABL-positive chronic myeloid leukemia (CML), and BCR-ABL-negative MPNs including primary myelofibrosis (PMF), essential thrombocythemia (ET), and so forth. One of the diagnostic requirements for PMF and ET is the absence of the Philadelphia chromosome, while its presence is almost universally indicative of CML. However, a diagnostic dilemma arises when Philadelphia chromosome-positive MPNs lack the majority of the typical features seen in CML. Some of these classic CML features include basophilIa, marked leukocytosis, neutrophils left-shift with myelocytes bulge, and “dwarf” megakaryocytes. Presented here is a case of a 32-year-old pregnant patient who did not have typical morphologic findings for CML, and yet the Philadelphia chromosome was positive. The patient demonstrated some pathologic features that are commonly presented in PMF that included bone marrow reticulin fibrosis, leukoerythroblastosis, splenomegaly, and increased serum lactate dehydrogenase.