The cation content and composition of mineral deposits in cerebral vessels in a case of Fahr's syndrome was studied by laser-spectrographic analysis. It was shown that in addition to Ca and Fe, other minerals such as Mg, Al, and Zn accumulated in pathologic deposits. The occurrence of cations other than Ca and Fe in these deposits had not been previously reported. The observations made in this study may contribute to a better understanding of the etiopathogenesis of Fahr's syndrome.
A neuropathological description is presented of a solitary giant abscess located in the oblongate medulla of a child aged two. This abscess destroyed almost all the morphological structures in the medulla and caused considerable constriction and translocation of the IVth ventricle. Apart from the exceptional occurrence of an abscess in this brain region, the interesting features of this case are the slow development of the abscess (probably 8 months) and the existence of a well-formed connective tissue capsule, demarcating the lesion from its surroundings. The diagnostic difficulties and clinical and histopathological correlation are also discussed.
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