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April 1980

Radiodense Ions Within a Third Ventricular Colloid Cyst

Author Affiliations

From the Department of Neurology (Dr Donaldson) and the Division of Neurosurgery (Dr Simon), University of Connecticut School of Medicine, Farmington.

Arch Neurol. 1980;37(4):246. doi:10.1001/archneur.1980.00500530084017

• The mucinous contents of a third ventricular colloid (neuroepithelial) cyst is invisible with standard radiographic techniques, but is radiodense with computerized tomography. Atomic emission spectrometry detected primarily sodium, calcium, and magnesium with the mucin. The absorption coefficient of colloid cysts (42 to 76 Hounsfield units) is attributed to the distribution of calcium throughout the mucin.

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