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Imber BS, Sehgal R, Saganty R, Reiner AS, Ilica AT, Miao E, Li BT, Riely GJ, Yu HA, Panageas KS, Young RJ, Pike LR, Moss NS. Intracranial Outcomes of De Novo Brain Metastases Treated With Osimertinib Alone in Patients With Newly Diagnosed EGFR-Mutant NSCLC. JTO Clin Res Rep 2023; 4:100607. [PMID: 38124791 PMCID: PMC10730363 DOI: 10.1016/j.jtocrr.2023.100607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 11/08/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023] Open
Abstract
Introduction Patients with EGFR-mutant NSCLC have a high incidence of brain metastases. The EGFR-directed tyrosine kinase inhibitor osimertinib has intracranial activity, making the role of local central nervous system (CNS)-directed therapies, such as radiation and surgery, less clear. Methods Patients with EGFR-mutant NSCLC and brain metastases who received osimertinib as initial therapy after brain metastasis diagnosis were included. Individual lesion responses were assessed using adapted RANO-BM criteria. CNS progression and local progression of brain metastasis from osimertinib start were analyzed using cumulative incidence treating death as a competing risk. Overall survival was estimated using Kaplan-Meier methodology. Results There were 36 patients who had a median interval from brain metastasis diagnosis to first-line osimertinib initiation of 25 days. In total, 136 previously untreated brain metastases were tracked from baseline. Overall, 105 lesions (77.2%) had complete response and 31 had partial response reflecting best objective response of 100%. Best response occurred at a median of 96 days (range: 28-1113 d) from baseline magnetic resonance imaging. This reflects a best objective response rate of 100%. Two-year overall survival was 80%. CNS progression rates at 1-, 2-, and 3-years post-osimertinib were 21%, 32%, and 41%, respectively. Lesion-level local failure was estimated to be 0.7% and 4.7% at 1- and 2-years post-osimertinib, respectively. No clinicodemographic factors including brain metastasis number were associated with post-osimertinib progression. Conclusions Intracranial response to osimertinib is excellent for patients with EGFR-mutant NSCLC with de novo, previously untreated brain metastases. Very low local failure rates support a strategy of upfront osimertinib alone in selected patients.
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Affiliation(s)
- Brandon S. Imber
- Department of Radiation Oncology and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Ryka Sehgal
- Department of Neurosurgery and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Rachel Saganty
- Department of Radiation Oncology and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Anne S. Reiner
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - A. Turan Ilica
- Division of Neuroradiology, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Emily Miao
- Department of Radiation Oncology and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Bob T. Li
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, New York and Weill Cornell Medical College, New York, New York
| | - Gregory J. Riely
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, New York and Weill Cornell Medical College, New York, New York
| | - Helena A. Yu
- Division of Solid Tumor Oncology, Memorial Sloan Kettering Cancer Center, New York, New York and Weill Cornell Medical College, New York, New York
| | - Katherine S. Panageas
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Robert J. Young
- Division of Neuroradiology, Department of Radiology, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Luke R.G. Pike
- Department of Radiation Oncology and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
| | - Nelson S. Moss
- Department of Neurosurgery and Multidisciplinary Brain Metastasis Center, Memorial Sloan Kettering Cancer Center, New York, New York
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Imber BS, O’Dwyer E, Lobaugh S, McBride SM, Hopkins M, Kollmeier M, Gorovets D, Brennan V, Pike LR, Gewanter R, Mychalczak B, Zhang Z, Schöder H, Zelefsky MJ. Failure Patterns by PSMA PET for Recurrent Prostate Cancer after Prostatectomy and Salvage Radiation. Urology 2022; 170:146-153. [PMID: 36115426 PMCID: PMC10576466 DOI: 10.1016/j.urology.2022.08.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 08/17/2022] [Accepted: 08/22/2022] [Indexed: 12/24/2022]
Abstract
OBJECTIVE To characterize patterns of failure using prostate-specific membrane antigen positron emission tomography (PSMA PET) after radical prostatectomy (RP) and salvage radiotherapy (SRT). METHODS Patients with rising PSA post-RP+SRT underwent 68Ga-HBED-iPSMA PET/CT on a single-arm, prospective imaging trial (NCT03204123). Scans were centrally reviewed with pattern-of-failure analysis by involved site. Positive scans were classified using 3 failure categories: pelvic nodal, extra-pelvic nodal or distant non-nodal. Associations with failure categories were analyzed using cumulative incidence and generalized logits regression. RESULTS We included 133 men who received SRT a median of 20 months post-RP; 56% received SRT to the prostatic fossa alone, while 44% received pelvic SRT. PSMA PET/CT was performed a median of 48 months post-SRT. Overall, 31% of PSMA PET/CT scans were negative, 2% equivocal and 67% had at least 1 positive site. Scan detection was significantly associated with PSA level prior to PSMA PET/CT. Analysis of 89 positive scans demonstrated pelvic nodal (53%) was the most common relapse and fossa relapse was low (9%). Overall, positive scans were pelvic (n = 35, 26%), extra-pelvic nodal (n = 26, 20%) or distant non-nodal failure (n = 28, 21%), and 70% of positive scans were oligorecurrent. We observed similar cumulative incidence for all failure categories and relatively few clinicodemographic associations. Men treated with pelvic SRT had reduced odds of pelvic failure versus exclusive fossa treatment. CONCLUSION Pelvic, extra-pelvic nodal, and distant non-nodal failures occur with similar incidence post-SRT. Regional nodal relapse is relatively common, especially with fossa-only SRT. A high oligorecurrence rate suggests a potentially important role for PSMA-guided focal therapies.
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Affiliation(s)
- Brandon S. Imber
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Elisabeth O’Dwyer
- Molecular Imaging and Therapeutics, Department of Radiology, Weill Cornell Medical College, New York, NY 10065
| | - Stephanie Lobaugh
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Sean M. McBride
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Margaret Hopkins
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Marisa Kollmeier
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Daniel Gorovets
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Victoria Brennan
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Luke R.G. Pike
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Richard Gewanter
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Borys Mychalczak
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Zhigang Zhang
- Department of Epidemiology and Biostatistics, Memorial Sloan Kettering Cancer Center, New York, NY 10065
| | - Heiko Schöder
- Department of Radiology, Molecular Imaging and Therapy Service, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Michael J. Zelefsky
- Department of Radiation Oncology, Memorial Sloan Kettering Cancer Center, New York, NY 10065
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Pike LR, Bang A, Mahal BA, Taylor A, Krishnan M, Spektor A, Cagney DN, Aizer AA, Alexander BM, Rahma O, Balboni T, Ott PA, Hodi FS, Schoenfeld JD. The Impact of Radiation Therapy on Lymphocyte Count and Survival in Metastatic Cancer Patients Receiving PD-1 Immune Checkpoint Inhibitors. Int J Radiat Oncol Biol Phys 2019; 103:142-151. [DOI: 10.1016/j.ijrobp.2018.09.010] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 08/25/2018] [Accepted: 09/08/2018] [Indexed: 12/13/2022]
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