[Labyrinth nuclei as observed in dermatofibrosarcoma protuberans and fibroxanthoma (author's transl)].

In the electron microscope the nuclei of benign and malignant tumors as well as the nuclei of normal cells exhibit relatively various structural features. In this study the author reports on two mesenchymal tumors of the skin (one case of dermatofibrosarcoma protuberans and one of fibroxanthoma) with pecular nuclear polymorphism which can be visualized by electron microscopy only.