Application of MET-PET in Fusion With MRI in the Treatment of Glioblastoma Multiforme
NCT Number: NCT06466031
Status: NOT_YET_RECRUITING
Study Type: INTERVENTIONAL
Phases: NA
Conditions: Glioblastoma Multiforme
Interventions: OTHER: MRI & PET fusion|OTHER: MRI+T1C
Sponsor: Copernicus Memorial Hospital
Collaborators: Medical Research Agency, Poland
Sex: ALL
Age: ADULT, OLDER_ADULT
Enrollment: 189
Study Design: Allocation: RANDOMIZED|Intervention Model: PARALLEL|Masking: DOUBLE (INVESTIGATOR, OUTCOMES_ASSESSOR)|Primary Purpose: TREATMENT
Start Date: 2024-09-01
Completion Date: 2032-07-31
Locations: Copernicus Memorial Hospital in Łódź, Poland, Łódź, Łódzkie, 93-513, Poland

Summary:
Glioblastoma multiforme (GBM IV WHO) is the most common, primary neoplasm of brain in the adults. Simultanously it is the most agressive one of all primary brain tumors. Despite the treatment the outcome in that group of patients is poor. In case of the optimal therapy the estimated median of survival ranges between 12 and 16 months. The present standard of treatment embraces the gross total resection with the preserved neurological functions and the posoperative management according to the Stupp's protocol (fractionated radiotherapy of 60 Gy dose and the chemotherapy with Temozolamide).

Annually the incidence rate of GBM is 5/100.000 of population. According to the National Tumor Registry 2494 people went down to the malignant neoplasmatic disease of brain classified as C71 (ICD-10) in 2020. The evaluation indicates that it is 600 new patients with the diagnosis of GBM. The disease becomes the 9th cause of death among males and the 13th one among females. The peak of incidence appears in the 5th decade of life and concerns the most productive population. Routinely the management embraces the planning of the resection surgery based on the preoperative magnetic resonance investigation (MRI) with contrast. The common image of the tumor allows to put the preliminary diagnosis with the high probability rate. The GBM occurs as the enhanced tumor with the central necrosis and the circumferential brain edema visible in T2 and Flair sequences of MRI. Commonly the border of tumor becomes the line of contrast enhancement. The enhances area is the aim of surgical treatment. The lack of the preoperative enhanced area in the postoperative MRI is assumed as the gross total resection (GTR). It has been proved that the range of the resection translates into the overall survival (OS) and the progression free survival (PFS). Despite the resection classified as GTR the relapse in the operated area often occurs. It can be explained by the presence of the glioma stem cells in the surrounding neuronal tissue. They are responsible for the early relapse of GBM. Notably, it is evident that the MRI with contrast becomes the method which does not reveal the proper range of resection with the relevant sensitivity so as to extend PFS and OS. The positron emission tomography (PET) is one of the diagnostic methods having been clinically evaluated. PET assesses the metabolic demand of the neoplasm for the biochemical substrates. That methodology is commonly used in case of severity of the solid tumors. The fluorodeoxyglucose (18-FDG) is the most frequently used. However the high metabolism of glucose within the brain, particularly in the grey matter, 18-FDG has the limitation in the process of planning of the tumor resection. The higher specificity and sensitivity are elicited among the markers including aminoacids, praticularly 11-C methionine (11C-MET). Within the gliomas the higher uptake is observed than in the healthy brain. The range of the contrast enhancement in the MRI covers only 58% of the higher 11C-MET metabolism. Comparing these results with a tumor resection beyond the enhancement area, indicates the necessity of the precise assessment of the proposed method in the routine planning of the glioma resection.

Current body of literature lacks in high quality research concerning that issue. The articles regarding the glioma resection beyond the GTR may be found instead. The surgery is limited to the resection of brain area with the incorrect signal in the FLAIR sequence, suspected of the presence of glioma stem cells. The described technique allows to extend PFS by for about 2 months. In that case the resection is based mainly on the FLAIR sequence which does not determine the presence of the neoplasm therein. The fusion of the MRI and the MET-PET images would allow to plan the resection so as to cover the area of incorrectly increased marker uptake.

Primary Outcome Measures: Progression-free survival, 36 months post surgery|Overall survival, 36 months post surgery
Secondary Outcome Measures: Assessment of tumor volume (GTV) in MRI with contrast in relation to the tumor borders in PET-CT, It will be assessed as the ratio of the treated tumor volume volumetrically based on MRI+T1C and FLAIR examination by software to the tumor volume estimated in a homogeneous way based on PET-CT examination. Both measurements will be verified independently by a neurosurgeon and a nuclear medicine specialist. This value will allow you to estimate how large the differences are treatment planning based on two different modalities - morphological assessment of the tumor and assessment of metabolic activity., 1 day before radiotherapy|Volumetric assessment of the planned radiotherapy volume based on PET-MRI and MRI planning., 1 day before radiotherapy|Long-term survival rate and prognostic factors (longer than 1 year from diagnosis)., Detailed analysis of factors prognostically favorable for long-term survival, which will allow for better selection of therapeutic options and possible reoperation in this group of patients., 36 months post surgery|Pattern of local recurrence based on postoperative PET-MRI. Assessment of the nature and location of local recurrence based on the postoperative SUV parameter MET-PET and MRI examination., The purpose of this analysis is to develop risk factors for recurrence based on postoperative radiological examinations., 36 months post surgery|Assessment of quality of life related (SF-36 questionnaire) to the increase in the volume of the tumor undergoing treatment., Increasing the scope surgery and radiotherapy treatment may result in deterioration of the patient's functioning. Therefore, the above factors will be analyzed for correlation the scope of resection and the functioning of patients. The evaluation will be performed by neurosurgeons and a psychologist trained in neuropsychological assessment., 7 days post surgery, 1 day before and after radiotherapy