Would you offer adjuvant chemotherapy to a young adult with undifferentiated embryonal sarcoma of the liver?

This is an "ultra" rare and interesting entity, predominantly seen in the pediatric population, but I have seen a few in adults. This should not be confused with embryonal RMS - totally different entity. Clearly there is no data, and there will never be any data to support an evidence-based recommendation. That said, I do have a couple patients who are disease-free for more than 10 years after adjuvant Doxorubicin-Ifosfamide. I do not know of any who have been cured with surgery alone, but obvio...