[Morphology of cardiac myxomas].

Author describes her experiences gained by light microscopic, immunohistochemical and electronmicroscopic studies of 11 cardiac myxomas. New data on debated histogenesis of myxomas were tried to be gained by her studies. A part of myxoma cells was poor in organelles ultrastructurally, mostly settled by one, in the other part more organelles and intra-cytoplasmatic filaments could be detected, majority of them was of process. Glandular structures, showing mucous production, were in a tumor. Majority of tumor cells showed vimentin immunoreactive by immunohistochemical studies. In addition, lysozyme immunoreactive cells could also be observed; 8th factor associated antigen, however, could be detected in glandular structures. On basis of studies, the assumption seems to be probably, according to which the cardiac myxomas originate from embryonal cells, capable to endodermal and mesodermal cytogenesis.