• Toxicities from the start of infusion through the dose limiting toxicity observation period(Phase I) [ Time Frame: Start of IL13-PE38QQR infusion to Day 35 or Day 75 ] [ Designated as safety issue: Yes ]
  Toxicities reported are those occurring from the start of the IL13 infusion after catheter placement to Day 35 (30 days after the end of the infusion) if there are no or mild MRI changes on Day 35 around the catheter tract or tip. If the MRI change on Day 35 indicates moderate or extensive changes around the catheter tract or tip then the toxicities reported are those occurring from the start of the IL13 infusion to Day 75 (70 days after the end of the infusion).
  
  
• Maximum safe flow rate (Phase I) [ Time Frame: Start of IL13-PE38QQR infusion to Day 35 or Day 70 ] [ Designated as safety issue: Yes ]
  Two total flow rates of IL13-PE38QQR, 500 uL/hr and 750 uL/hr, will be studied based on a traditional phase I design. Dose-limiting toxicities occurring during the dose-finding period will determine the maximum safe flow rate. The dose-finding period is the start of the IL13 infusion after catheter placement to Day 35 if there are none or mild MRI changes around the catheter tract or tip on Day 35. If there are moderate or extensive MRI changes around the catheter tract or tip on Day 35 then the dose-finding period is from the start of the IL13 infusion to Day 75.
  
  
• Maximum tolerated infusion concentration (Phase I) [ Time Frame: Start of IL13-PE38QQR infusion to Day 35 or Day 70 ] [ Designated as safety issue: Yes ]
  Two infusion concentrations of IL13-PE38QQR, .25 ug/mL and .50 ug/mL, will be studied based on a traditional phase I design. Dose-limiting toxicities occurring during the dose-finding period will determine the maximum tolerated infusion concentration. The dose-finding period is the start of the IL13 infusion after catheter placement to Day 35 if there are none or mild MRI changes around the catheter tract or tip on Day 35. If there are moderate or extensive MRI changes around the catheter tract or tip on Day 35 then the dose-finding period is from the start of the IL13 infusion to Day 75.
  
  
• Survival post initial recurrence or progression at the maximum safe total flow rate and maximum tolerated infusion concentration (Phase II) [ Time Frame: Initial progression to date of death from any cause ] [ Designated as safety issue: No ]
  

• Progression-free survival (Phase II) [ Time Frame: Initial progression to second progression ] [ Designated as safety issue: No ]
  
• IL13receptor α2 chain expression status and distribution [ Time Frame: Pre-treatment ] [ Designated as safety issue: No ]
  Expression of the IL13 receptor α2 chain will be determined by immunohistochemistry analysis of previously banked fixed primary tumor sections in addition to samples obtained during the on-study resection. Expression of the IL13 receptor α2 chain will also be determined by western blot analysis of previously banked fresh frozen primary tumor samples in addition to samples of relapsed fresh frozen tumor obtained during the on-study resection.
  
  
• Overall safety [ Time Frame: Start of IL13-PE38QQR infusion to disease progression or alternative treatment ] [ Designated as safety issue: Yes ]
  Adverse events reported are those occurring from the start of the IL13 infusion after catheter placement to the maximum of disease progression, start of alternative therapy, withdrawal from the study, death, or completion of the follow-up period. Adverse events will be tabulated by first occurrence of the event, by body system, by maximum severity, and by the highest degree of relationship to the study medication.
  
  
• Tolerability [ Time Frame: Start of IL13-PE38QQR infusion to disease progression or alternative treatment ] [ Designated as safety issue: Yes ]
  Adverse events reported are those occurring from the start of the IL13 infusion after catheter placement to the maximum of disease progression, start of alternative therapy, withdrawal from the study, death, or completion of the follow-up period. Adverse events will be tabulated by first occurrence of the event, by body system, by maximum severity, and by the highest degree of relationship to the study medication.
  
  

OBJECTIVES:

Primary

• Determine the toxicity of peritumoral IL13-PE38QQR after surgical resection in pediatric patients with recurrent malignant gliomas. (Phase I)
• Determine the maximum tolerated flow rate and maximum tolerated infusion concentration (MTiC) of this drug in these patients. (Phase I)
• Estimate the rate of survival after initial progression in patients treated at the maximum safe flow rate and MTiC with this drug. (Phase II)

Secondary

• Describe the overall safety and tolerability of this regimen in these patients from the start of infusion through disease progression or initiation of alternative treatment.
• Determine the IL13 receptor α2 chain expression status and distribution in pediatric recurrent or progressive malignant gliomas
• Estimate the progression-free survival of patients treated with this drug. (Phase II)

OUTLINE: This is a multicenter, dose-escalation study.

• Phase I: Patients undergo surgical resection of the tumor. Within 2-7 days later, patients undergo placement of 2-4 peritumoral catheters. One to 2 days later, patients receive peritumoral IL13-PE38QQR continuously over 96 hours. Catheters are removed after completion of the infusion.

Cohorts of 3 patients receive IL13-PE38QQR at escalating flow rates and a fixed concentration until the maximum safe flow rate is determined. The maximum safe flow rate is defined as the rate prior to the one at which 2 of 3 or more patients experience dose-limiting toxicity.

Following determination of the maximum safe flow rate, cohorts of 2-3 patients receive IL13-PE38QQR at escalating concentrations at the maximum safe flow rate until the maximum tolerated infusion concentration (MTiC) is determined. The MTiC is defined as the concentration prior to the one at which 2 of 3 or more patients experience dose-limiting toxicity.

• Phase II: Patients receive IL13-PE38QQR as above at the maximum safe flow rate and MTiC determined in the phase I of the study.

Patients are followed at week 18 after catheter placement and then every 8 weeks thereafter until death, disease progression, or completion of six months (phase I) or 12 months (phase II) of follow-up after the end of IL13-PE38QQR infusion. Phase II patients who complete one year of follow-up without disease progression are followed every 12 weeks thereafter until death.

PROJECTED ACCRUAL: Approximately 2-50 patients (2-24 for phase I and approximately 26 for phase II) will be accrued for this study.