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Case Reports in Orthopedics
Volume 2017, Article ID 2416365, 4 pages
Case Report

Myelopathy due to Spinal Extramedullary Hematopoiesis in a Patient with Polycythemia Vera

1Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
2Department of Orthopaedic Surgery, National Defence Medical College, Saitama, Japan
3Department of Orthopaedic Surgery, Fujita Health University School of Medicine, Aichi, Japan

Correspondence should be addressed to Nobuyuki Fujita; pj.oiek.7a@atijufn

Received 22 August 2016; Revised 22 November 2016; Accepted 21 December 2016; Published 4 January 2017

Academic Editor: Paolo Perrini

Copyright © 2017 Shuhei Ito 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.


Extramedullary hematopoiesis (EMH) occasionally occurs in patients exhibiting hematological disorders with decreased hematopoietic efficacy. EMH is rarely observed in the spinal epidural space and patients are usually asymptomatic. In particular, in the patients with polycythemia vera, spinal cord compression due to EMH is extremely rare. We report a case of polycythemia vera, in which operative therapy proved to be an effective treatment for myelopathy caused by spinal EMH.