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Published in: European Radiology 6/2021

01-06-2021 | NSCLC | Neuro

Immune checkpoint inhibitor therapy may increase the incidence of treatment-related necrosis after stereotactic radiosurgery for brain metastases: a systematic review and meta-analysis

Authors: Pyeong Hwa Kim, Chong Hyun Suh, Ho Sung Kim, Kyung Won Kim, Dong Yeong Kim, Ayal A. Aizer, Rifaquat Rahman, Jeffrey P. Guenette, Raymond Y. Huang

Published in: European Radiology | Issue 6/2021

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Abstract

Objectives

To compare the incidence of treatment-related necrosis between combination SRS+ICI therapy and SRS therapy alone in patients with brain metastases from melanoma and non-small cell lung cancer (NSCLC).

Methods

A systematic literature search of Ovid-MEDLINE and EMBASE was performed up to August 10, 2020. The difference in the pooled incidence of treatment-related necrosis after SRS+ICI or SRS alone was evaluated. The cumulative incidence of treatment-related necrosis at the specific time point after the treatment was calculated and plotted. Subgroup and meta-regression analyses were additionally performed.

Results

Sixteen studies (14 on melanoma, 2 on NSCLC) were included. In NSCLC brain metastasis, the reported incidences of treatment-related necrosis in SRS+ICI and SRS alone ranged 2.9–3.4% and 0–2.9%, respectively. Meta-analysis was conducted including 14 studies on melanoma brain metastasis. The incidence of treatment-related necrosis was higher in SRS+ICI than SRS alone (16.0% vs. 6.5%; p = 0.065; OR, 2.35). The incidence showed rapid increase until 12 months after the SRS when combined with ICI therapy (14%; 95% CI, 8–22%) and its pace of increase slowed thereafter. Histopathologic diagnosis as the reference standard for treatment-related necrosis and inclusion of only symptomatic cases were the source of heterogeneity in SRS+ICI.

Conclusions

Treatment-related necrosis tended to occur 2.4 times more frequently in the setting of combination SRS+ICI therapy compared with SRS alone in melanoma brain metastasis showing high cumulative incidence within the first year. Treatment-related necrosis should be considered when SRS+ICI combination therapy is used for melanoma brain metastasis, especially in the first year.

Key Points

• Treatment-related necrosis occurred 2.4 times more frequently in the setting of combination SRS+ICI therapy compared with SRS alone in melanoma brain metastasis.
• Treatment-related necrosis more frequently occurred in brain metastases from melanoma than NSCLC.
• Reference standard for treatment-related necrosis and inclusion of only symptomatic treatment-related necrosis were a significant source of heterogeneity, indicating varying definitions of treatment-related necrosis in the literature need to be unified.
Literature
1.
go back to reference Gavrilovic IT, Posner JB (2005) Brain metastases: epidemiology and pathophysiology. J Neurooncol 75:5–14PubMed Gavrilovic IT, Posner JB (2005) Brain metastases: epidemiology and pathophysiology. J Neurooncol 75:5–14PubMed
2.
go back to reference Nayak L, Lee EQ, Wen PY (2012) Epidemiology of brain metastases. Curr Oncol Rep 14:48–54PubMed Nayak L, Lee EQ, Wen PY (2012) Epidemiology of brain metastases. Curr Oncol Rep 14:48–54PubMed
3.
go back to reference Barnholtz-Sloan JS, Sloan AE, Davis FG, Vigneau FD, Lai P, Sawaya RE (2004) Incidence proportions of brain metastases in patients diagnosed (1973 to 2001) in the Metropolitan Detroit Cancer Surveillance System. J Clin Oncol 22:2865–2872PubMed Barnholtz-Sloan JS, Sloan AE, Davis FG, Vigneau FD, Lai P, Sawaya RE (2004) Incidence proportions of brain metastases in patients diagnosed (1973 to 2001) in the Metropolitan Detroit Cancer Surveillance System. J Clin Oncol 22:2865–2872PubMed
4.
go back to reference Schouten LJ, Rutten J, Huveneers HA, Twijnstra A (2002) Incidence of brain metastases in a cohort of patients with carcinoma of the breast, colon, kidney, and lung and melanoma. Cancer 94:2698–2705PubMed Schouten LJ, Rutten J, Huveneers HA, Twijnstra A (2002) Incidence of brain metastases in a cohort of patients with carcinoma of the breast, colon, kidney, and lung and melanoma. Cancer 94:2698–2705PubMed
5.
go back to reference Cagney DN, Martin AM, Catalano PJ et al (2017) Incidence and prognosis of patients with brain metastases at diagnosis of systemic malignancy: a population-based study. Neuro Oncol 19:1511–1521PubMedPubMedCentral Cagney DN, Martin AM, Catalano PJ et al (2017) Incidence and prognosis of patients with brain metastases at diagnosis of systemic malignancy: a population-based study. Neuro Oncol 19:1511–1521PubMedPubMedCentral
6.
go back to reference Sampson JH, Carter JH Jr, Friedman AH, Seigler HF (1998) Demographics, prognosis, and therapy in 702 patients with brain metastases from malignant melanoma. J Neurosurg 88:11–20PubMed Sampson JH, Carter JH Jr, Friedman AH, Seigler HF (1998) Demographics, prognosis, and therapy in 702 patients with brain metastases from malignant melanoma. J Neurosurg 88:11–20PubMed
7.
go back to reference Amer MH, Al-Sarraf M, Vaitkevicius VK (1979) Clinical presentation, natural history and prognostic factors in advanced malignant melanoma. Surg Gynecol Obstet 149:687–692PubMed Amer MH, Al-Sarraf M, Vaitkevicius VK (1979) Clinical presentation, natural history and prognostic factors in advanced malignant melanoma. Surg Gynecol Obstet 149:687–692PubMed
8.
go back to reference Budman DR, Camacho E, Wittes RE (1978) The current causes of death in patients with malignant melanoma. Eur J Cancer 14:327–330PubMed Budman DR, Camacho E, Wittes RE (1978) The current causes of death in patients with malignant melanoma. Eur J Cancer 14:327–330PubMed
9.
go back to reference Davis FG, Dolecek TA, McCarthy BJ, Villano JL (2012) Toward determining the lifetime occurrence of metastatic brain tumors estimated from 2007 United States cancer incidence data. Neuro Oncol 14:1171–1177PubMedPubMedCentral Davis FG, Dolecek TA, McCarthy BJ, Villano JL (2012) Toward determining the lifetime occurrence of metastatic brain tumors estimated from 2007 United States cancer incidence data. Neuro Oncol 14:1171–1177PubMedPubMedCentral
10.
go back to reference Giglio P, Gilbert MR (2003) Cerebral radiation necrosis. Neurologist 9:180–188PubMed Giglio P, Gilbert MR (2003) Cerebral radiation necrosis. Neurologist 9:180–188PubMed
11.
go back to reference Patel TR, McHugh BJ, Bi WL, Minja FJ, Knisely JP, Chiang VL (2011) A comprehensive review of MR imaging changes following radiosurgery to 500 brain metastases. AJNR Am J Neuroradiol 32:1885–1892PubMedPubMedCentral Patel TR, McHugh BJ, Bi WL, Minja FJ, Knisely JP, Chiang VL (2011) A comprehensive review of MR imaging changes following radiosurgery to 500 brain metastases. AJNR Am J Neuroradiol 32:1885–1892PubMedPubMedCentral
13.
go back to reference Minniti G, Anzellini D, Reverberi C et al (2019) Stereotactic radiosurgery combined with nivolumab or ipilimumab for patients with melanoma brain metastases: evaluation of brain control and toxicity. J Immunother Cancer 7:102PubMedPubMedCentral Minniti G, Anzellini D, Reverberi C et al (2019) Stereotactic radiosurgery combined with nivolumab or ipilimumab for patients with melanoma brain metastases: evaluation of brain control and toxicity. J Immunother Cancer 7:102PubMedPubMedCentral
14.
go back to reference Diao K, Bian SX, Routman DM et al (2018) Combination ipilimumab and radiosurgery for brain metastases: tumor, edema, and adverse radiation effects. J Neurosurg 129:1397–1406PubMedPubMedCentral Diao K, Bian SX, Routman DM et al (2018) Combination ipilimumab and radiosurgery for brain metastases: tumor, edema, and adverse radiation effects. J Neurosurg 129:1397–1406PubMedPubMedCentral
15.
go back to reference Martin AM, Cagney DN, Catalano PJ et al (2018) Immunotherapy and symptomatic radiation necrosis in patients with brain metastases treated with stereotactic radiation. JAMA Oncol 4:1123–1124PubMedPubMedCentral Martin AM, Cagney DN, Catalano PJ et al (2018) Immunotherapy and symptomatic radiation necrosis in patients with brain metastases treated with stereotactic radiation. JAMA Oncol 4:1123–1124PubMedPubMedCentral
16.
go back to reference Kaidar-Person O, Zagar TM, Deal A et al (2017) The incidence of radiation necrosis following stereotactic radiotherapy for melanoma brain metastases: the potential impact of immunotherapy. Anticancer Drugs 28:669–675PubMed Kaidar-Person O, Zagar TM, Deal A et al (2017) The incidence of radiation necrosis following stereotactic radiotherapy for melanoma brain metastases: the potential impact of immunotherapy. Anticancer Drugs 28:669–675PubMed
17.
go back to reference Liberati A, Altman DG, Tetzlaff J et al (2009) The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration. Ann Intern Med 151:W65–W94PubMed Liberati A, Altman DG, Tetzlaff J et al (2009) The PRISMA statement for reporting systematic reviews and meta-analyses of studies that evaluate health care interventions: explanation and elaboration. Ann Intern Med 151:W65–W94PubMed
18.
go back to reference Atkins D, Eccles M, Flottorp S et al (2004) Systems for grading the quality of evidence and the strength of recommendations I: critical appraisal of existing approaches The GRADE Working Group. BMC Health Serv Res 4:38PubMedPubMedCentral Atkins D, Eccles M, Flottorp S et al (2004) Systems for grading the quality of evidence and the strength of recommendations I: critical appraisal of existing approaches The GRADE Working Group. BMC Health Serv Res 4:38PubMedPubMedCentral
19.
go back to reference Guyatt G, Oxman AD, Akl EA et al (2011) GRADE guidelines: 1. Introduction-GRADE evidence profiles and summary of findings tables. J Clin Epidemiol 64:383–394PubMed Guyatt G, Oxman AD, Akl EA et al (2011) GRADE guidelines: 1. Introduction-GRADE evidence profiles and summary of findings tables. J Clin Epidemiol 64:383–394PubMed
20.
21.
go back to reference Kim KW, Lee J, Choi SH, Huh J, Park SH (2015) Systematic review and meta-analysis of studies evaluating diagnostic test accuracy: a practical review for clinical researchers-part I. General guidance and tips. Korean J Radiol 16:1175–1187PubMedPubMedCentral Kim KW, Lee J, Choi SH, Huh J, Park SH (2015) Systematic review and meta-analysis of studies evaluating diagnostic test accuracy: a practical review for clinical researchers-part I. General guidance and tips. Korean J Radiol 16:1175–1187PubMedPubMedCentral
22.
go back to reference Lee J, Kim KW, Choi SH, Huh J, Park SH (2015) Systematic review and meta-analysis of studies evaluating diagnostic test accuracy: a practical review for clinical researchers-part II. Statistical methods of meta-analysis. Korean J Radiol 16:1188–1196PubMedPubMedCentral Lee J, Kim KW, Choi SH, Huh J, Park SH (2015) Systematic review and meta-analysis of studies evaluating diagnostic test accuracy: a practical review for clinical researchers-part II. Statistical methods of meta-analysis. Korean J Radiol 16:1188–1196PubMedPubMedCentral
23.
go back to reference Egger M, Davey Smith G, Schneider M, Minder C (1997) Bias in meta-analysis detected by a simple, graphical test. BMJ 315:629–634PubMedPubMedCentral Egger M, Davey Smith G, Schneider M, Minder C (1997) Bias in meta-analysis detected by a simple, graphical test. BMJ 315:629–634PubMedPubMedCentral
24.
go back to reference Sterne JA, Egger M, Smith GD (2001) Systematic reviews in health care: investigating and dealing with publication and other biases in meta-analysis. BMJ 323:101–105PubMedPubMedCentral Sterne JA, Egger M, Smith GD (2001) Systematic reviews in health care: investigating and dealing with publication and other biases in meta-analysis. BMJ 323:101–105PubMedPubMedCentral
25.
go back to reference Silk AW, Bassetti MF, West BT, Tsien CI, Lao CD (2013) Ipilimumab and radiation therapy for melanoma brain metastases. Cancer Med 2:899–906PubMedPubMedCentral Silk AW, Bassetti MF, West BT, Tsien CI, Lao CD (2013) Ipilimumab and radiation therapy for melanoma brain metastases. Cancer Med 2:899–906PubMedPubMedCentral
26.
go back to reference Knisely JP, Yu JB, Flanigan J, Sznol M, Kluger HM, Chiang VL (2012) Radiosurgery for melanoma brain metastases in the ipilimumab era and the possibility of longer survival. J Neurosurg 117:227–233PubMedPubMedCentral Knisely JP, Yu JB, Flanigan J, Sznol M, Kluger HM, Chiang VL (2012) Radiosurgery for melanoma brain metastases in the ipilimumab era and the possibility of longer survival. J Neurosurg 117:227–233PubMedPubMedCentral
27.
go back to reference Skrepnik T, Sundararajan S, Cui H, Stea B (2017) Improved time to disease progression in the brain in patients with melanoma brain metastases treated with concurrent delivery of radiosurgery and ipilimumab. Oncoimmunology 6:e1283461PubMedPubMedCentral Skrepnik T, Sundararajan S, Cui H, Stea B (2017) Improved time to disease progression in the brain in patients with melanoma brain metastases treated with concurrent delivery of radiosurgery and ipilimumab. Oncoimmunology 6:e1283461PubMedPubMedCentral
28.
go back to reference Pires da Silva I, Glitza IC, Haydu LE et al (2019) Incidence, features and management of radionecrosis in melanoma patients treated with cerebral radiotherapy and anti-PD-1 antibodies. Pigment Cell Melanoma Res 32:553–563PubMed Pires da Silva I, Glitza IC, Haydu LE et al (2019) Incidence, features and management of radionecrosis in melanoma patients treated with cerebral radiotherapy and anti-PD-1 antibodies. Pigment Cell Melanoma Res 32:553–563PubMed
29.
go back to reference Patel KR, Shoukat S, Oliver DE et al (2017) Ipilimumab and stereotactic radiosurgery versus stereotactic radiosurgery alone for newly diagnosed melanoma brain metastases. Am J Clin Oncol 40:444–450PubMed Patel KR, Shoukat S, Oliver DE et al (2017) Ipilimumab and stereotactic radiosurgery versus stereotactic radiosurgery alone for newly diagnosed melanoma brain metastases. Am J Clin Oncol 40:444–450PubMed
30.
go back to reference Nardin C, Mateus C, Texier M et al (2018) Tolerance and outcomes of stereotactic radiosurgery combined with anti-programmed cell death-1 (pembrolizumab) for melanoma brain metastases. Melanoma Res 28:111–119PubMed Nardin C, Mateus C, Texier M et al (2018) Tolerance and outcomes of stereotactic radiosurgery combined with anti-programmed cell death-1 (pembrolizumab) for melanoma brain metastases. Melanoma Res 28:111–119PubMed
31.
go back to reference Kotecha R, Miller JA, Venur VA et al (2018) Melanoma brain metastasis: the impact of stereotactic radiosurgery, BRAF mutational status, and targeted and/or immune-based therapies on treatment outcome. J Neurosurg 129:50–59PubMed Kotecha R, Miller JA, Venur VA et al (2018) Melanoma brain metastasis: the impact of stereotactic radiosurgery, BRAF mutational status, and targeted and/or immune-based therapies on treatment outcome. J Neurosurg 129:50–59PubMed
32.
go back to reference Du Four S, Janssen Y, Michotte A et al (2018) Focal radiation necrosis of the brain in patients with melanoma brain metastases treated with pembrolizumab. Cancer Med 7:4870–4879PubMedPubMedCentral Du Four S, Janssen Y, Michotte A et al (2018) Focal radiation necrosis of the brain in patients with melanoma brain metastases treated with pembrolizumab. Cancer Med 7:4870–4879PubMedPubMedCentral
33.
go back to reference Robin TP, Breeze RE, Smith DE et al (2018) Immune checkpoint inhibitors and radiosurgery for newly diagnosed melanoma brain metastases. J Neurooncol 140:55–62PubMedPubMedCentral Robin TP, Breeze RE, Smith DE et al (2018) Immune checkpoint inhibitors and radiosurgery for newly diagnosed melanoma brain metastases. J Neurooncol 140:55–62PubMedPubMedCentral
34.
go back to reference Olson AC, Thomas S, Qin R et al (2016) Outcomes and toxicity of stereotactic radiosurgery for melanoma brain metastases in patients receiving ipilimumab. Melanoma Manag 3:177–186PubMedPubMedCentral Olson AC, Thomas S, Qin R et al (2016) Outcomes and toxicity of stereotactic radiosurgery for melanoma brain metastases in patients receiving ipilimumab. Melanoma Manag 3:177–186PubMedPubMedCentral
35.
go back to reference Hubbeling HG, Schapira EF, Horick NK et al (2018) Safety of combined PD-1 pathway inhibition and intracranial radiation therapy in non–small cell lung cancer. J Thorac Oncol 13:550–558PubMed Hubbeling HG, Schapira EF, Horick NK et al (2018) Safety of combined PD-1 pathway inhibition and intracranial radiation therapy in non–small cell lung cancer. J Thorac Oncol 13:550–558PubMed
36.
go back to reference Fang P, Jiang W, Allen P et al (2017) Radiation necrosis with stereotactic radiosurgery combined with CTLA-4 blockade and PD-1 inhibition for treatment of intracranial disease in metastatic melanoma. J Neurooncol 133:595–602PubMed Fang P, Jiang W, Allen P et al (2017) Radiation necrosis with stereotactic radiosurgery combined with CTLA-4 blockade and PD-1 inhibition for treatment of intracranial disease in metastatic melanoma. J Neurooncol 133:595–602PubMed
37.
go back to reference Yang L, Liu L, Wu X, Guo X, Yang Y, Wang T (2020) Hypofractionated radiation therapy with versus without immune checkpoint inhibitors in patients with brain metastases: a meta-analysis. Int Immunopharmacol 80:106148 Yang L, Liu L, Wu X, Guo X, Yang Y, Wang T (2020) Hypofractionated radiation therapy with versus without immune checkpoint inhibitors in patients with brain metastases: a meta-analysis. Int Immunopharmacol 80:106148
38.
go back to reference Anderson ES, Postow MA, Wolchok JD et al (2017) Melanoma brain metastases treated with stereotactic radiosurgery and concurrent pembrolizumab display marked regression; efficacy and safety of combined treatment. J Immunother Cancer 5:76PubMedPubMedCentral Anderson ES, Postow MA, Wolchok JD et al (2017) Melanoma brain metastases treated with stereotactic radiosurgery and concurrent pembrolizumab display marked regression; efficacy and safety of combined treatment. J Immunother Cancer 5:76PubMedPubMedCentral
39.
go back to reference Trommer-Nestler M, Marnitz S, Kocher M et al (2018) Robotic stereotactic radiosurgery in melanoma patients with brain metastases under simultaneous anti-PD-1 treatment. Int J Mol Sci 19:2653 Trommer-Nestler M, Marnitz S, Kocher M et al (2018) Robotic stereotactic radiosurgery in melanoma patients with brain metastases under simultaneous anti-PD-1 treatment. Int J Mol Sci 19:2653
40.
go back to reference Galldiks N, Kocher M, Ceccon G et al (2020) Imaging challenges of immunotherapy and targeted therapy in patients with brain metastases: response, progression, and pseudoprogression. Neuro Oncol 22:17–30PubMed Galldiks N, Kocher M, Ceccon G et al (2020) Imaging challenges of immunotherapy and targeted therapy in patients with brain metastases: response, progression, and pseudoprogression. Neuro Oncol 22:17–30PubMed
41.
go back to reference Alomari AK, Cohen J, Vortmeyer AO et al (2016) Possible interaction of Anti-PD-1 therapy with the effects of radiosurgery on brain metastases. Cancer Immunol Res 4:481–487PubMed Alomari AK, Cohen J, Vortmeyer AO et al (2016) Possible interaction of Anti-PD-1 therapy with the effects of radiosurgery on brain metastases. Cancer Immunol Res 4:481–487PubMed
42.
go back to reference Rauch PJ, Park HS, Knisely JP, Chiang VL, Vortmeyer AO (2012) Delayed radiation-induced vasculitic leukoencephalopathy. Int J Radiat Oncol Biol Phys 83:369–375PubMed Rauch PJ, Park HS, Knisely JP, Chiang VL, Vortmeyer AO (2012) Delayed radiation-induced vasculitic leukoencephalopathy. Int J Radiat Oncol Biol Phys 83:369–375PubMed
43.
go back to reference Alomari A, Rauch PJ, Orsaria M, Minja FJ, Chiang VL, Vortmeyer AO (2014) Radiologic and histologic consequences of radiosurgery for brain tumors. J Neurooncol 117:33–42PubMed Alomari A, Rauch PJ, Orsaria M, Minja FJ, Chiang VL, Vortmeyer AO (2014) Radiologic and histologic consequences of radiosurgery for brain tumors. J Neurooncol 117:33–42PubMed
44.
go back to reference Winter SF, Loebel F, Loeffler J et al (2019) Treatment-induced brain tissue necrosis: a clinical challenge in neuro-oncology. Neuro Oncol 21:1118–1130 Winter SF, Loebel F, Loeffler J et al (2019) Treatment-induced brain tissue necrosis: a clinical challenge in neuro-oncology. Neuro Oncol 21:1118–1130
45.
go back to reference Alexander BM, Brown PD, Ahluwalia MS et al (2018) Clinical trial design for local therapies for brain metastases: a guideline by the Response Assessment in Neuro-Oncology Brain Metastases working group. Lancet Oncol 19:e33–e42PubMed Alexander BM, Brown PD, Ahluwalia MS et al (2018) Clinical trial design for local therapies for brain metastases: a guideline by the Response Assessment in Neuro-Oncology Brain Metastases working group. Lancet Oncol 19:e33–e42PubMed
46.
go back to reference Camidge DR, Lee EQ, Lin NU et al (2018) Clinical trial design for systemic agents in patients with brain metastases from solid tumours: a guideline by the Response Assessment in Neuro-Oncology Brain Metastases working group. Lancet Oncol 19:e20–e32PubMed Camidge DR, Lee EQ, Lin NU et al (2018) Clinical trial design for systemic agents in patients with brain metastases from solid tumours: a guideline by the Response Assessment in Neuro-Oncology Brain Metastases working group. Lancet Oncol 19:e20–e32PubMed
47.
go back to reference Okada H, Weller M, Huang R et al (2015) Immunotherapy response assessment in neuro-oncology: a report of the RANO working group. Lancet Oncol 16:e534–e542PubMedPubMedCentral Okada H, Weller M, Huang R et al (2015) Immunotherapy response assessment in neuro-oncology: a report of the RANO working group. Lancet Oncol 16:e534–e542PubMedPubMedCentral
48.
go back to reference Na A, Haghigi N, Drummond KJ (2014) Cerebral radiation necrosis. Asia Pac J Clin Oncol 10:11–21PubMed Na A, Haghigi N, Drummond KJ (2014) Cerebral radiation necrosis. Asia Pac J Clin Oncol 10:11–21PubMed
49.
go back to reference van Dijken BRJ, van Laar PJ, Holtman GA, van der Hoorn A (2017) Diagnostic accuracy of magnetic resonance imaging techniques for treatment response evaluation in patients with high-grade glioma, a systematic review and meta-analysis. Eur Radiol 27:4129–4144PubMedPubMedCentral van Dijken BRJ, van Laar PJ, Holtman GA, van der Hoorn A (2017) Diagnostic accuracy of magnetic resonance imaging techniques for treatment response evaluation in patients with high-grade glioma, a systematic review and meta-analysis. Eur Radiol 27:4129–4144PubMedPubMedCentral
50.
go back to reference Kim SJ, Ryul Shim S (2019) Diagnostic value of radiolabeled amino acid PET for detection of pseudoprogression of brain tumor after treatment: a meta-analysis. Nucl Med Commun 40:965–972PubMed Kim SJ, Ryul Shim S (2019) Diagnostic value of radiolabeled amino acid PET for detection of pseudoprogression of brain tumor after treatment: a meta-analysis. Nucl Med Commun 40:965–972PubMed
51.
go back to reference Nishino M, Hatabu H, Hodi FS (2019) Imaging of cancer immunotherapy: current approaches and future directions. Radiology 290:9–22PubMed Nishino M, Hatabu H, Hodi FS (2019) Imaging of cancer immunotherapy: current approaches and future directions. Radiology 290:9–22PubMed
52.
go back to reference Abbasi AW, Westerlaan HE, Holtman GA, Aden KM, van Laar PJ, van der Hoorn A (2018) Incidence of tumour progression and pseudoprogression in high-grade gliomas: a systematic review and meta-analysis. Clin Neuroradiol 28:401–411PubMed Abbasi AW, Westerlaan HE, Holtman GA, Aden KM, van Laar PJ, van der Hoorn A (2018) Incidence of tumour progression and pseudoprogression in high-grade gliomas: a systematic review and meta-analysis. Clin Neuroradiol 28:401–411PubMed
53.
go back to reference Park HJ, Kim KW, Pyo J et al (2020) Incidence of pseudoprogression during immune checkpoint inhibitor therapy for solid tumors: a systematic review and meta-analysis. Radiology 297:87–96 Park HJ, Kim KW, Pyo J et al (2020) Incidence of pseudoprogression during immune checkpoint inhibitor therapy for solid tumors: a systematic review and meta-analysis. Radiology 297:87–96
54.
go back to reference Goyal S, Silk AW, Tian S et al (2015) Clinical management of multiple melanoma brain metastases: a systematic review. JAMA Oncol 1:668–676PubMedPubMedCentral Goyal S, Silk AW, Tian S et al (2015) Clinical management of multiple melanoma brain metastases: a systematic review. JAMA Oncol 1:668–676PubMedPubMedCentral
Metadata
Title
Immune checkpoint inhibitor therapy may increase the incidence of treatment-related necrosis after stereotactic radiosurgery for brain metastases: a systematic review and meta-analysis
Authors
Pyeong Hwa Kim
Chong Hyun Suh
Ho Sung Kim
Kyung Won Kim
Dong Yeong Kim
Ayal A. Aizer
Rifaquat Rahman
Jeffrey P. Guenette
Raymond Y. Huang
Publication date
01-06-2021
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 6/2021
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-020-07514-0

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