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Repeated measurements of serum chrionic gonadotrophic hormone (CGH), of its beta sub-unit (beta CGH) and of alpha-foetoprotein (aFP) were performed in 200 patients with germinal tumours of the testis. CGH levels were found to be high in 43,5% of patients, particularly those with choriocarcinoma (a rare tumour) or with embryonal carcinoma with syncytiotrophoblastic (ST) cells. They were also high in 24% of patients with histologically pure seminoma, which throws doubts on the homogeneity of this group of tumours and raises problems concerning their treatment in patients with high CGH.
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