- At the time of study enrollment, the patient's treatment regimen must be identified; if the patient's primary tumor was resected prior to the day of enrollment and a blood specimen for the determination of serum alpha fetoprotein was not obtained prior to that surgery, the patient will be considered to have alpha fetoprotein of greater than 100 ng/mL for the purpose of treatment assignment; if tumor samples obtained prior to the date of enrollment were not sufficient to determine whether small cell undifferentiated (SCU) histology was present, treatment assignment will be made assuming SCU is not present in the tumor