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The decay pattern and half-life period evaluation of serum tumour markers are useful parameters in the management of testicular cancer in clinic stage 1. α-Fetoprotein and human chorionic gonadotropin serum levels measured after orchiectomy can be used to predict the tumour stage. However, the optimal strategy for marker analysis after orchiectomy has not yet been defined. In this article we describe a graphic interactive method which uses tumour marker clearance to help identify patients with occult metastases after orchiectomy. Copyright © 2004 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]