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Serum human chorionic gonadotropin levels were determined in 20 patients with histologically proved seminoma. The test was positive in 2 of the 20 patients and was predictive of non-seminomatous metastasis in each case. Serum human chorionic gonadotropin is a useful tumor marker in detecting and following non-seminomatous metastases in men with pure seminoma of the testis.
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James S. Cochran (1976) studied this question.
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