✓ Specimens of human choroid plexus, obtained during craniotomy, were examined by light and electron microscopy. Inclusions were observed within the cytoplasm of the choroidal epithelial cells, and could be classified into three types on the basis of morphological characteristics. Each inclusion type predominated in a particular age group. In choroid plexuses of older humans, filaments from 60 to 150 Å in diameter, with no apparent periodicity, were noted circumjacent to the intracytoplasmic inclusions.
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Dohrmann et al. (1970) studied this question.
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