Summary
Thirteen primary and metastatic testicular germ cell tumours, including classical and anaplastic seminomas, and non-seminomatous testicular tumours were examined for their intermediate filament protein (IFP) types. The seminomas were shown to react with a monoclonal and a polyclonal antibody to bovine lens vimentin, while non-seminomatous germ cell tumours were strongly positive for a polyclonal and a monoclonal antibody to cytokeratin.
In one case of seminoma with elevated serum levels ofβHCG andαFP, cytokeratin positive tumour cells were found. In the case of teratocarcinoma, several components of the tumour could be distinguished using a combination of antisera in double-label immunofluorescence microscopy. The glandular component of this tumour was positive with the polyclonal antikeratin, but also with the monoclonal cytokeratin antibody specific for glandular epithelia (RGE 53). However, the squamous component was negative with this latter antibody. Strikingly, the spindle cell component showed focal positivity for vimentin, with coexpression of cytokeratin and vimentin in some cells.
Our data show that antibodies to cytokeratin and vimentin can be helpful in the diagnosis of testicular germ cell tumours, especially in the differentiation between seminomas and non-seminomatous tumours.
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This study was supported by a grant from the Dutch Cancer Foundation, The Queen Wilhelmina Fund (KWF), project NUKC 1981-12
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Ramaekers, F., Feitz, W., Moesker, O. et al. Antibodies to cytokeratin and vimentin in testicular tumour diagnosis. Vichows Archiv A Pathol Anat 408, 127–142 (1985). https://doi.org/10.1007/BF00707977
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DOI: https://doi.org/10.1007/BF00707977