Diffuse cerebral blood vessel hyperdensity in polycythaemia
Presents with mild symptoms of dementia and no other neurological abnormalities. He was sent for a routine CT scan.
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Marked dIffuse hyperdensity of brain vessels (arteries, veins and sinuses) with measured density ca 55-60 HU.
This patient has a history of chronic obstructive pulmonary disease with polycythaemia (hemoglobin 19.7 g/dl / hematocrit 60.4%). Normal renal function. No history of previous intravenous contrast media administration.
Normal blood (hematocrit 45%) measures approximately 40 HU. Increase in the circulating red cell mass (hematocrit over 60%) results in diffuse hyperdensity of cerebral vessel with a density over 55 HU.
- Ben Salem D, Osseby GV, Rezaizadeh-Bourdariat K, et al. Spontaneous hyperdense intracranial vessels seen on CT scan in polycythemia cases. J Radiol 2003; 84: 605-8.
- Rastogi R, Computed Tomography of Brain in Polycythemia. MJAFI 2008; 64 : 377-378