RATIONALE: Drugs used in chemotherapy, such as doxorubicin and cisplatin, work in different ways to stop tumor cells from dividing so they stop growing or die. Radiation therapy uses high-energy x-rays to damage tumor cells. Combretastatin A4 phosphate may stop the growth of cancer by stopping blood flow to the tumor. Combining doxorubicin and cisplatin with radiation therapy and combretastatin A4 phosphate may kill more tumor cells.