Polycythemia vera

Polycythemia vera (PV) is an acquired myeloproliferative disorder characterized by an elevated absolute red blood cell mass caused by uncontrolled red blood cell production, frequently associated with uncontrolled white blood cell and platelet production.

Proptosis

An eye that is protruding anterior to the plane of the face to a greater extent than is typical.


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PMID (PMCID)
12125965
 MALE Middle Aged
Orbital apex syndrome: a rare presentation of extramedullary hematopoiesis: case report and review of literature.
Pless M, Rizzo JF 3rd, Shang J.
J Neurooncol. 2002;57(1):37-40.
A 64-year-old man with Polycythemia Rubra Vera developed unilateral visual loss, proptosis, complete ophthalmoplegia, and facial paresis.