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Intraoperative Radiotherapy in Newly Diagnosed Glioblastoma Multiforme

A Multicenter Randomized Phase III Trial on INTraoperative RAdiotherapy in Newly Diagnosed GliOblastoma Multiforme (INTRAGO II)

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02685605
Acronym
INTRAGO-II
Enrollment
314
Registered
2016-02-19
Start date
2016-12-09
Completion date
2026-06-30
Last updated
2025-10-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Glioblastoma

Keywords

Glioblastoma, Intraoperative Radiotherapy, Radiotherapy Dose Escalation

Brief summary

INTRAGO II resembles a multicentric, prospective, randomized, 2-arm, open-label clinical phase III trial which tests if the median progression-free survival (PFS) of patients with newly diagnosed glioblastoma multiforme (GBM) can be improved by the addition of intraoperative radiotherapy (IORT) to standard radiochemotherapy.

Interventions

Dose to applicator surface: 20-30 Gy; Carl Zeiss INTRABEAM System. IORT with a surface dose of 30 Gy is recommended.Should the proximity to any risk structure not allow to apply 30 Gy, a dose reduction by up to 10 Gy (resulting in a surface dose of 20 Gy) is allowed.

EBRT to 60 Gy plus 75 mg/m2/d temozolomide

DRUGTemozolomide

Adjuvant chemotherapy with 150-200 mg/m2/d temozolomide per cycle (5/28 days).

Sponsors

Carl Zeiss Meditec AG
CollaboratorINDUSTRY
University of California, Los Angeles
CollaboratorOTHER
Universitätsmedizin Mannheim
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

1. Age ≥18 and ≤ 80 years 2. Karnofsky Performance Score (KPS) ≥ 60% 3. Supratentorial T1-Gd enhancing lesion(s) amenable to total resection 4. Legal capacity and ability of subject to understand character and individual consequences of the clinical trial 5. Patient's written IC obtained at least 24h prior to surgery 6. For women with childbearing potential: adequate contraception 7. Patients must have adequate organ functions Bone marrow function: * Platelets ≥ 75.000/μL * WBC ≥ 3.000/μL * Hemoglobin ≥ 10.0 g/dL Liver Function: * ASAT and ALAT ≤ 3.0 times ULN * ALP ≤ 2.5 times ULN * Total Serum Bilirubin \< 1.5 times ULN Renal Function: * Serum Creatinine ≤ 1.5 times ULN Inclusion Criteria Related to Surgery: 8. IORT must be technically feasible 9. Histology supports diagnosis of GBM

Exclusion criteria

1. Multicentric disease (e.g. in both hemispheres) or non-resectable satellite lesions 2. Previous cranial radiation therapy 3. Cytostatic therapy / chemotherapy for cancer within the past 5 years 4. History of cancers or other comorbidities that limit life expectancy to less than five years 5. Previous therapy with anti-angiogenic substances (such as bevacizumab) 6. Technical impossibility to use MRI or known allergies against MRI and/or CT contrast agents 7. Participation in other clinical trials testing cancer-derived investigational agents/procedures. 8. Pregnant or breast feeding patients 9. Fertile patients refusing to use safe contraceptive methods during the study

Design outcomes

Primary

MeasureTime frameDescription
Median Progression-Free Survival24 MonthsDetermined according to modified Response Assessment in Neuro-Oncology (RANO) criteria and serial perfusion imaging

Secondary

MeasureTime frameDescription
PFS within a 1-2 cm margin around the cavity24 MonthsDetermined by serial contrast-enhanced MRI scans using modified RANO criteria and serial perfusion imaging
OS with respect to Age24 MonthsMedian overall survival of patients \<65 vs. ≥ 65 years
PFS with respect to Age24 MonthsProgression-free survival of patients \<65 vs. ≥ 65 years; determined according to modified RANO criteria and serial perfusion imaging
OS with respect to KPS24 MonthsMedian overall survival of patients with KPS 80-100% vs. 60-70%
PFS with respect to KPS24 MonthsProgression-free survival of patients with KPS 80-100% vs. 60-70%; determined according to modified RANO criteria and serial perfusion imaging
OS with respect to thickness of anticipated T1-Gd-enhancing (remaining) tumor margin24 MonthsThickness of anticipated T1-Gd-enhancing (remaining) tumor margin as per the discretion of the surgeon (margin ≥0.5 cm or multiple spots of residual tumor within the cavity vs. \<0.5 cm)
PFS with respect to thickness of anticipated T1-Gd-enhancing (remaining) tumor margin24 MonthsThickness of anticipated T1-Gd-enhancing (remaining) tumor margin as per the discretion of the surgeon (margin ≥0.5 cm or multiple spots of residual tumor within the cavity vs. \<0.5 cm); determined according to modified RANO criteria and serial perfusion imaging
Median Overall Survival24 Months
PFS with respect to extent of resection24 MonthsEarly postoperative MRI scans must be used to determine the extent of resection (EoR). The EoR is given as sum of all maximum diameters of residual lesions in cm. PFS will be determined according to modified RANO criteria and serial perfusion imaging for the following groups: * Max Diameter group 0: 0 cm (no residual tumor) * Max Diameter group 1: \>0 to ≤1.5 cm (cumulative if multiple residual lesions) * Max Diameter group 2: \>1.5 cm (cumulative if multiple residual lesions)
OS with respect to MGMT promoter methylation status24 MonthsOS in patients with promoter methylation vs. no promoter methylation
PFS with respect to MGMT promoter methylation status24 MonthsPFS in patients with promoter methylation vs. no promoter methylation; determined according to modified RANO criteria and serial perfusion imaging
Quality of Life (QoL) questionnaire24 MonthsAssessed by European Organization for Research and Treatment (EORTC)- Quality of Life Questionnaires (QLQ C30/BN20)
Activities of daily living (ADL), assessed using the Barthel Index (Mahoney & Barthel, 1965).24 MonthsChange in functional outcomes as measured by BI from its baseline value.
Radiation-related (acute / early delayed / late) neurotoxicity24 MonthsAssessed by regular neurological examinations and serial MRI scans
OS with respect to extent of resection24 MonthsEarly postoperative MRI scans must be used to determine the extent of resection (EoR). The EoR is given as sum of all maximum diameters of residual lesions in cm. OS will be calculated for the following groups: * Max Diameter group 0: 0 cm (no residual tumor) * Max Diameter group 1: \>0 to ≤1.5 cm (cumulative if multiple residual lesions) * Max Diameter group 2: \>1.5 cm (cumulative if multiple residual lesions)

Countries

Brazil, Canada, China, Germany, South Korea, Spain, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 4, 2026