[Morphology and index of nucleoli in malignant lymphomas]

The significance of morphology and the number of lymphocyte nucleoli was evaluated by electronmicroscopic sections of malignant lymphomas. It was not only the number and the size of nucleoli which characterized malignant lymphomas differing in histological respect, but above all the different morphology of the nucleoli. The prognostic significance of the nucleolus can be illustrated, if malignant lymphomas of a low grade malignancy with a preponderance of micronucleoli and a low nucleolar index are compared with a significantly higher nucleolar index and markedly increased macronucleoli. These differences are further supplemented by additional morphological properties of nucleoli in malignant lymphomas.