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[Liquor-scintigraphic findings with Yb 169-DTPA in cerebro-atrophic processes].

Liquor-scintigraphic examinations were carried out with Yb 169-DTPA in two patients, who were offering - clinically as well as by pneumo-encephalographic findings - the picture of a cerebro-atrophic process. Especially the first case showed the typical course and symptoms of Alzheimer's disease. A "stasis" of the radionuclide, lasting for 48 hours, was manifesting liquor-scintigraphically herein, in the course of which there was - initially - a weak representation of the ventricles. However, the complete clinical picture of a communicating hydrocephalus did not show up. In the second case, an undisturbed liquor circulation and absorption, to a great extent topically and temporally undisturbed, were observed. The question arises whether Alzheimer's disease is manifesting together with such a disturbance of the liquor circulation, already described also by other workers. The second case makes clear that the liquor space scintigraphy cannot be used as only diagnostic method in all cerebro-atrophic processes.