Reevaluating the imaging definition of tumor progression: perfusion MRI quantifies recurrent glioblastoma tumor fraction, pseudoprogression, and radiation necrosis to predict survival

Contrast-enhanced MRI (CE-MRI) represents the current mainstay for monitoring treatment response in glioblastoma multiforme (GBM), based on the premise that enlarging lesions reflect increasing tumor burden, treatment failure, and poor prognosis. Unfortunately, irradiating such tumors can induce cha...

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Veröffentlicht in:Neuro-oncology (Charlottesville, Va.) Va.), 2012-07, Vol.14 (7), p.919-930
Hauptverfasser: Hu, Leland S, Eschbacher, Jennifer M, Heiserman, Joseph E, Dueck, Amylou C, Shapiro, William R, Liu, Seban, Karis, John P, Smith, Kris A, Coons, Stephen W, Nakaji, Peter, Spetzler, Robert F, Feuerstein, Burt G, Debbins, Josef, Baxter, Leslie C
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container_issue 7
container_start_page 919
container_title Neuro-oncology (Charlottesville, Va.)
container_volume 14
creator Hu, Leland S
Eschbacher, Jennifer M
Heiserman, Joseph E
Dueck, Amylou C
Shapiro, William R
Liu, Seban
Karis, John P
Smith, Kris A
Coons, Stephen W
Nakaji, Peter
Spetzler, Robert F
Feuerstein, Burt G
Debbins, Josef
Baxter, Leslie C
description Contrast-enhanced MRI (CE-MRI) represents the current mainstay for monitoring treatment response in glioblastoma multiforme (GBM), based on the premise that enlarging lesions reflect increasing tumor burden, treatment failure, and poor prognosis. Unfortunately, irradiating such tumors can induce changes in CE-MRI that mimic tumor recurrence, so called post treatment radiation effect (PTRE), and in fact, both PTRE and tumor re-growth can occur together. Because PTRE represents treatment success, the relative histologic fraction of tumor growth versus PTRE affects survival. Studies suggest that Perfusion MRI (pMRI)-based measures of relative cerebral blood volume (rCBV) can noninvasively estimate histologic tumor fraction to predict clinical outcome. There are several proposed pMRI-based analytic methods, although none have been correlated with overall survival (OS). This study compares how well histologic tumor fraction and OS correlate with several pMRI-based metrics. We recruited previously treated patients with GBM undergoing surgical re-resection for suspected tumor recurrence and calculated preoperative pMRI-based metrics within CE-MRI enhancing lesions: rCBV mean, mode, maximum, width, and a new thresholding metric called pMRI-fractional tumor burden (pMRI-FTB). We correlated all pMRI-based metrics with histologic tumor fraction and OS. Among 25 recurrent patients with GBM, histologic tumor fraction correlated most strongly with pMRI-FTB (r = 0.82; P < .0001), which was the only imaging metric that correlated with OS (P
doi_str_mv 10.1093/neuonc/nos112
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Unfortunately, irradiating such tumors can induce changes in CE-MRI that mimic tumor recurrence, so called post treatment radiation effect (PTRE), and in fact, both PTRE and tumor re-growth can occur together. Because PTRE represents treatment success, the relative histologic fraction of tumor growth versus PTRE affects survival. Studies suggest that Perfusion MRI (pMRI)-based measures of relative cerebral blood volume (rCBV) can noninvasively estimate histologic tumor fraction to predict clinical outcome. There are several proposed pMRI-based analytic methods, although none have been correlated with overall survival (OS). This study compares how well histologic tumor fraction and OS correlate with several pMRI-based metrics. We recruited previously treated patients with GBM undergoing surgical re-resection for suspected tumor recurrence and calculated preoperative pMRI-based metrics within CE-MRI enhancing lesions: rCBV mean, mode, maximum, width, and a new thresholding metric called pMRI-fractional tumor burden (pMRI-FTB). We correlated all pMRI-based metrics with histologic tumor fraction and OS. Among 25 recurrent patients with GBM, histologic tumor fraction correlated most strongly with pMRI-FTB (r = 0.82; P &lt; .0001), which was the only imaging metric that correlated with OS (P&lt;.02). The pMRI-FTB metric reliably estimates histologic tumor fraction (i.e., tumor burden) and correlates with OS in the context of recurrent GBM. 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Unfortunately, irradiating such tumors can induce changes in CE-MRI that mimic tumor recurrence, so called post treatment radiation effect (PTRE), and in fact, both PTRE and tumor re-growth can occur together. Because PTRE represents treatment success, the relative histologic fraction of tumor growth versus PTRE affects survival. Studies suggest that Perfusion MRI (pMRI)-based measures of relative cerebral blood volume (rCBV) can noninvasively estimate histologic tumor fraction to predict clinical outcome. There are several proposed pMRI-based analytic methods, although none have been correlated with overall survival (OS). This study compares how well histologic tumor fraction and OS correlate with several pMRI-based metrics. We recruited previously treated patients with GBM undergoing surgical re-resection for suspected tumor recurrence and calculated preoperative pMRI-based metrics within CE-MRI enhancing lesions: rCBV mean, mode, maximum, width, and a new thresholding metric called pMRI-fractional tumor burden (pMRI-FTB). We correlated all pMRI-based metrics with histologic tumor fraction and OS. Among 25 recurrent patients with GBM, histologic tumor fraction correlated most strongly with pMRI-FTB (r = 0.82; P &lt; .0001), which was the only imaging metric that correlated with OS (P&lt;.02). The pMRI-FTB metric reliably estimates histologic tumor fraction (i.e., tumor burden) and correlates with OS in the context of recurrent GBM. This technique may offer a promising biomarker of tumor progression and clinical outcome for future clinical trials.</abstract><cop>England</cop><pub>Oxford University Press</pub><pmid>22561797</pmid><doi>10.1093/neuonc/nos112</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects Adult
Aged
Blood Volume
Brain Neoplasms - mortality
Brain Neoplasms - pathology
Brain Neoplasms - therapy
Clinical Investigations
Cohort Studies
Disease Progression
Female
Follow-Up Studies
Glioblastoma - mortality
Glioblastoma - pathology
Glioblastoma - therapy
Humans
Magnetic Resonance Angiography
Male
Middle Aged
Necrosis
Neoplasm Recurrence, Local - mortality
Neoplasm Recurrence, Local - pathology
Neoplasm Recurrence, Local - therapy
Neoplasm Staging
Prognosis
Radiation Injuries - diagnosis
Radiation Injuries - etiology
Survival Rate
Tumor Burden
title Reevaluating the imaging definition of tumor progression: perfusion MRI quantifies recurrent glioblastoma tumor fraction, pseudoprogression, and radiation necrosis to predict survival
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