Summary
Ten nephroblastomas were investigated by antibodies to inter-mediate filaments. In seven cases, which in light microscopy were characterized by the presence of blastema and tubules, immunofluorescence microscopy with IF-specific antibodies reveals expression of cytokeratin and vimentin in blastema cells, while tubules were only labelled by the cytokeratin antibodies. This result was independent of whether the conventional cytokeratin antibody or monoclonal antibodies specific for cytokeratin 18 were used. Stroma cells were vimentin-positive. In two cases nephroblastomas were undifferentiated and also lacked tubuli formation. In both these tumors blastema cells were vimentin-positive and cytokeratin-negative. Finally one case of clear cell sarcoma of the kidney could only be labelled by the vimentin antibody. Thus antibodies to intermediate filaments seem to be useful tools to distinguish nephroblastomas from neuroblastomas or rhabdomyosarcomas, especially in cases of metastasis.
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Altmannsberger, M., Osborn, M., Schäfer, H. et al. Distinction of nephroblastomas from other childhood tumors using antibodies to intermediate filaments. Virchows Archiv B Cell Pathol 45, 113–124 (1984). https://doi.org/10.1007/BF02889858
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DOI: https://doi.org/10.1007/BF02889858