Haley K Perlow, David R Raleigh, Tony J C Wang, Erqi L Pollom, Michael T Milano, William G Breen, Jay Detsky, Eric L Chang, Martin C Tom, Kevin R Shiue, Eric J Lehrer, Hina Saeed, Luke R G Pike, Simon S Lo, Mark V Mishra, Jonathan P S Knisely, Samuel T Chao, Arjun Sahgal, Joshua D Palmer
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引用次数: 0
Abstract
Background: Meningiomas are the most common primary intracranial tumor. Somatostatin receptor 2 (SSTR 2) is almost universally expressed in meningioma tissue. For patients who require adjuvant radiation, SSTR based (68)Ga-DOTATATE positron emission tomography (PET) imaging can detect additional or residual disease not discernible on magnetic resonance imaging (MRI). PET-guided radiation treatments may improve local control, minimize toxicity by allowing for more precise radiotherapy plans, and allow for more precise dose escalation to maximize local control. The aim of this study was to develop consensus PET-guided treatment planning guidelines for common meningioma presentations.
Methods: Five post-operative clinically relevant meningioma cases were selected from a prospective single-institutional registry of patients. Each patient had a preoperative and post-operative contrast enhanced T1-weighted volumetric MRI, and a post-operative (68)Ga-DOTATATE PET/CT, to assist with target delineation. The full treatment scenario including clinical history, histology, surgical history, and imaging were provided for each patient. Nineteen international experts who have published on the treatment and management of meningiomas, and who utilize (68)Ga-DOTATATE PET/CT in their practice, evaluated each case. Individual prescription recommendations were created, pooled, and discussed to create consensus recommendations.
Results: Consensus recommendations were created for each case. In most cases, PET-based contouring allowed for more precise-dose escalation to 66-70Gy targeting residual disease. When compared to RTOG 0539 and modern clinical trial contouring guidelines, a smaller CTV expansion from the surgical cavity was recommended using PET-guided radiation plans in the absence of radiographic or pathologic evidence of brain or bone invasion.
Conclusion: This report provides consensus target volume delineation guidelines for meningiomas receiving postoperative radiation in common clinical situations. Integration of these guidelines into clinical practice may allow for more precise biomarker-guided radiation treatments and standardize radiotherapy on future meningioma clinical trials.
期刊介绍:
International Journal of Radiation Oncology • Biology • Physics (IJROBP), known in the field as the Red Journal, publishes original laboratory and clinical investigations related to radiation oncology, radiation biology, medical physics, and both education and health policy as it relates to the field.
This journal has a particular interest in original contributions of the following types: prospective clinical trials, outcomes research, and large database interrogation. In addition, it seeks reports of high-impact innovations in single or combined modality treatment, tumor sensitization, normal tissue protection (including both precision avoidance and pharmacologic means), brachytherapy, particle irradiation, and cancer imaging. Technical advances related to dosimetry and conformal radiation treatment planning are of interest, as are basic science studies investigating tumor physiology and the molecular biology underlying cancer and normal tissue radiation response.