Abstract
Diffuse hyperdensity affecting the Circle of Willis, dural sinuses and other vessels is sometimes encountered on non-enhanced computed tomography (NECT) scans of brain. Polycythemia produces this appearance and it is associated with an increase in circulating red cell mass. This condition is often complicated by both arterial and venous thrombosis, hence an early diagnosis becomes imperative. Since many polycythemic patients are asymptomatic until late in disease or present with nonspecific symptoms, NECT brain done for some nonspecific neurologic abnormality can give a clue to the diagnosis. We report this case for its rarity and unique characteristic appearance of polycythemia on unenhanced CT brain.
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