A graphical method to analyze serum tumor marker decay in nonseminomatous testis tumors

The decay pattern and half-life estimation of serum tumor markers are useful parameters in the management of nonseminomatous germ cell tumors of the testis. We describe a graphical method of evaluating the temporal pattern of tumor marker clearance that can be used to identify patients with residual tumor after orchiectomy alone or retroperitoneal lymphadenectomy.