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Lei Zhao
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JCSE01 - Perspectives for Lung Cancer Early Detection (ID 779)
- Event: WCLC 2018
- Type: Joint IASLC/CSCO/CAALC Session
- Track: Screening and Early Detection
- Presentations: 1
- Moderators:
- Coordinates: 9/23/2018, 07:30 - 11:15, Room 202 BD
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JCSE01.20 - Outcome in Small Cell Lung Cancer Patients with Cerebral Recurrence After Prior Prophylactic Cranial Irradiation (ID 14710)
11:15 - 11:15 | Presenting Author(s): Lei Zhao
- Abstract
Background
Prophylactic cranial irradiation (PCI) is a standard therapy for both limited small cell lung cancer (SCLC) and extensive SCLC patients with good responses to first-line treatment. The aim of this study was to examine outcomes in SCLC patients in a single institution who underwent cerebral recurrence after prior PCI.We retrospectively examined the medical records of 219 consecutive SCLC patients who had initially received PCI(25 Gray in 10 fractions) between June 2007 to June 2017. Data were analyzed with regard to age, sex, smoking status, treatment, disease stage, data of PCI, time to cerebral recurrence, site of cerebral recurrence, re-irradiation after cerebral recurrence and time to death. Survival was estimated by the Kaplan-Meier method. Multivariate analyses were performed by the log-rank and Cox’s proportional hazard model test.
Of the 219 patients undergoing PCI, 180(82.2%) were LD-SCLC and 39(17.8%) were ED-SCLC. The median age was 59 years and the median follow-up time was 23.7 months. The median overall survival (OS) of all patients from the time of diagnosis was 39.0 months (95%CI, 29.6–48.4), in LD-SCLC it was 47.0 months (95%CI, 35.4–58.6), and in ED-SCLC it was 19.0 months (95%CI, 17.0–21.0). The difference was statistically significant with P=0.000.
Forty-six patients (21.0%) were diagnosed with cerebral recurrence. 30(65.2%) of these presented with oligometastatic disease and 16(34.8%) had non-oligometastatic disease. Cox multivariate analysis identified disease stage (P=0.043) was the only significantly favorable prognostic factor for cerebral recurrence. The median survival time from PCI was 21.0 months (95%CI, 12.5–29.5), in oligmetastatic disease it was 35.0 months (95%CI, 19.0–51.0), and in non-oligometastatic disease it was 16.0 months (95%CI, 12.1–19.9). The difference was statistically significant with P=0.007. Meanwhile, the median time from PCI to cerebral recurrence was 11.0 months (95%CI, 9.5–12.5), in oligmetastatic disease it was 11.0 months (95%CI, 6.7–15.3), and in non-oligometastatic disease it was 10.0 months (95%CI, 8.4–11.6). There was no statistical significance between the two.
Among forty-six patients with cerebral recurrence, 34 patients underwent re-irradiation using either Re-WBRT (11patients, 23.9%) or SRS /SRT (23patients, 50.0%), another 12 patients (26.1%) did not accept radiotherapy to brain. The median survival time from cerebral recurrence was 10 months (95%CI, 4.1-16.0) for re-irradiation and 4 months (95%CI, 2.3-5.8) for no radiotherapy group, respectively. The difference was statistically significant with P=0.000.
PCI remains standard therapy for SCLC patients with good responses to first-line treatment. Cerebral recurrence is inevitable, however, cerebral re-irradiation after recurrence is proven to be beneficial for survival.
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P1.12 - Small Cell Lung Cancer/NET (Not CME Accredited Session) (ID 944)
- Event: WCLC 2018
- Type: Poster Viewing in the Exhibit Hall
- Track:
- Presentations: 1
- Moderators:
- Coordinates: 9/24/2018, 16:45 - 18:00, Exhibit Hall
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P1.12-18 - Outcome in Small Cell Lung Cancer Patients with Cerebral Recurrence After Prior Prophylactic Cranial Irradiation (ID 12601)
16:45 - 18:00 | Presenting Author(s): Lei Zhao
- Abstract
Background
Prophylactic cranial irradiation (PCI) is a standard therapy for both limited small cell lung cancer (SCLC) and extensive SCLC patients with good responses to first-line treatment. The aim of this study was to examine outcomes in SCLC patients in a single institution who underwent cerebral recurrence after prior PCI.
a9ded1e5ce5d75814730bb4caaf49419 Method
We retrospectively examined the medical records of 219 consecutive SCLC patients who had initially received PCI(25 Gray in 10 fractions) between June 2007 to June 2017. Data were analyzed with regard to age, sex, smoking status, treatment, disease stage, data of PCI, time to cerebral recurrence, site of cerebral recurrence, re-irradiation after cerebral recurrence and time to death. Survival was estimated by the Kaplan-Meier method. Multivariate analyses were performed by the log-rank and Cox’s proportional hazard model test.
4c3880bb027f159e801041b1021e88e8 Result
Of the 219 patients undergoing PCI, 180(82.2%) were LD-SCLC and 39(17.8%) were ED-SCLC. The median age was 59 years and the median follow-up time was 23.7 months. The median overall survival (OS) of all patients from the time of diagnosis was 39.0 months (95%CI, 29.6–48.4), in LD-SCLC it was 47.0 months (95%CI, 35.4–58.6), and in ED-SCLC it was 19.0 months (95%CI, 17.0–21.0). The difference was statistically significant with P=0.000.
Forty-six patients (21.0%) were diagnosed with cerebral recurrence. 30(65.2%) of these presented with oligometastatic disease and 16(34.8%) had non-oligometastatic disease. Cox multivariate analysis identified disease stage (P=0.043) was the only significantly favorable prognostic factor for cerebral recurrence. The median survival time from PCI was 21.0 months (95%CI, 12.5–29.5), in oligmetastatic disease it was 35.0 months (95%CI, 19.0–51.0), and in non-oligometastatic disease it was 16.0 months (95%CI, 12.1–19.9). The difference was statistically significant with P=0.007. Meanwhile, the median time from PCI to cerebral recurrence was 11.0 months (95%CI, 9.5–12.5), in oligmetastatic disease it was 11.0 months (95%CI, 6.7–15.3), and in non-oligometastatic disease it was 10.0 months (95%CI, 8.4–11.6). There was no statistical significance between the two.
Among forty-six patients with cerebral recurrence, 34 patients underwent re-irradiation using either Re-WBRT (11patients, 23.9%) or SRS /SRT (23patients, 50.0%), another 12 patients (26.1%) did not accept radiotherapy to brain. The median survival time from cerebral recurrence was 10 months (95%CI, 4.1-16.0) for re-irradiation and 4 months (95%CI, 2.3-5.8) for no radiotherapy group, respectively. The difference was statistically significant with P=0.000.
8eea62084ca7e541d918e823422bd82e Conclusion
PCI remains standard therapy for SCLC patients with good responses to first-line treatment. Cerebral recurrence is inevitable, however, cerebral re-irradiation after recurrence is proven to be beneficial for survival.
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