<prompt> Treatment of stage I teratoma is: September 2008ChemotherapyRadiotherapySurgeryObservation  <response>: Ans. D: Observation Teratomas are not radiosensitive Stage 1 can be managed by monitoring the levels of serum markers and by repeat CT. Teratoma at stage 2-4 are managed by chemotherapy Cispaltin, methotrexate, bleomycin and vincristine 