[Characteristics of the level of lipid-bound sialic acids in the blood of patients with brain tumors].

In hemispheric tumors, the highest blood levels of lipid-conjugated acid were found in patients with malignant tumors despite their histology. In the blood of patients with benign tumors of the same site, the content of lipid-conjugated acids was the same as the control ones. However, the blood of patients with chiasmal-cellar tumors did not show these features. The blood level of lipid-conjugated acids in these patients did not depend on tumor histogenesis, but it was generally high. In patients with benign tumours of the chiasmal-cellar region, the levels of lipid-conjugated acids were the same as in patients with malignant hemispheric tumors. This is suggested by the fact that patients with meningiomas or gliomas of the chiasmal-cellar site without anaplastic signs exhibit much higher blood levels of lipid-conjugated acids than those with the similar tumors of the hemispheric site.