[The late results of marking a surgical wound of the brain with tantalum powder].

Distribution in the organism of the tantalum after its application on the brain surgical wound was studied by light microscopy and atomic-emission spectrum analysis with an induction-linked plasma in patients dying from neuro oncological diseases. It is found that in all cases a partial tantalum migration into various brain regions and internal organs occurs. Blood cells are able to fix the tantalum particles in vivo and in vitro, this process being enhanced after a preceding angiography.