[Comparing electron microscopical investigation of cells from mesotheliomas (author's transl)].

The difficulties of diagnosing cells originating in mesotheliomas by light microscopic methods are well known. Therefore we tried to find some additional criterions for the cytologic diagnosis using electron microscopy. Only the microvilli seemed to be a distinct criterion as seen by electron microscopy. By this we were able to differentiate mesothelioma cells from macrophages which exhibited large appendices of their cell borders.