Spinal epidural extramedullary hematopoiesis during the complicated course of polycythemia vera.

Extramedullary hematopoiesis (EMH) may uncommonly develop during the course of polycythemia vera (PV). We herein present a 57-year-old patient with spinal epidural EMH that developed during the complicated course of PV and his outcome under different treatment modalities including hydroxyurea, 32P, radiotherapy and surgery.