- Consolidation therapy (begins within 3-5 weeks of the last dose of induction chemotherapy or radiotherapy): Patients receive cisplatin IV over 1 hour on day 1 and etoposide IV over 1 hour on days 1-3 of weeks 11 and 14. Patients also receive monoclonal antibody 11D10 anti-idiotype vaccine (TriAb) and monoclonal antibody GD2 anti-idiotype vaccine (TriGem) intradermally on day 1 of weeks 11, 13, 15, and 17 (4 injections) and then monthly subcutaneously for 2 years. Treatment continues in the absence of disease progression or unacceptable toxicity.