RATIONALE: A peripheral blood stem cell transplant or bone marrow transplant using stem cells
from the patient may be able to replace immune cells that were destroyed by chemotherapy and
image-guided intensity-modulated radiation therapy used to kill tumor cells.
PURPOSE: This phase I trial is studying the side effects and best dose of bone marrow
radiation therapy followed by an autologous stem cell transplant in treating patients with
high-risk or relapsed solid tumors.