Abstract
A 73-year-old woman with JAK-2–positive polycythemia vera, myelodysplastic/myeloproliferative overlap disorder, and biopsy-proven extramedullary hematopoiesis (EMH) involving pleura and paravertebral regions presented with 6 weeks of headaches and blurry vision. Examination showed bilateral papilledema, preserved acuity, and mild right pyramidal weakness. MRI brain showed homogenously enhancing dural lesions with no associated edema (figure). She underwent external beam radiation (10 fractions, 200 cGy/fraction) for symptomatic management.
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