Karenitecin in Pediatric Patients With Refractory or Recurrent Solid Tumors N10010)

"An accelerated titration dose escalation design will be used in this study. Dose escalation will function independently for each stratum. Patients in both strata will receive Karenitecin and cyclophosphamide administered as an IV infusion each day for 5 consecutive days. In addition, patients in Stratum 1 will receive prophylactic G-CSF starting 24 hours after completion of the fifth dose of Karenitecin and cyclophosphamide (and continuing daily until the ANC is over 1500/mm3 after nadir). The regimen will be repeated every 21 days (1 treatment cycle).~Treatment may continue for up to 20 cycles, provided there is continued evidence of clinical benefit and absence of unacceptable toxicity."