Prophylactic cranial irradiation in patients with small cell lung cancer. A retrospective study of recurrence, survival and morbidity
ABSTRACT Prophylactic cerebral irradiation (PCI) is a standard treatment for all small cell lung cancer (SCLC) patients with response to chemotherapy. The aims of this study were: to evaluate patients undergoing PCI with regard to cerebral recurrence rate, site of recurrence, and overall survival (OS) and to investigate the influence of steroid dose on acute toxicity.
From 2007 to 2010 a total of 118 consecutive patients underwent PCI (25 Gray in 10 fractions). In total, 114/118 received full PCI dose, all 118 were included in the study. Data were analyzed retrospectively with regard to disease stage, treatment, date of PCI, steroid dose during PCI, toxicity, time to recurrence, site of recurrence and time of death. The median follow up time was 16.6 months (range 3-54 months).
Of the 118 patients undergoing PCI, 74 had limited disease (LD-SCLC) and 44 had extensive disease (ED-SCLC). The median age was 65 years (range 46-80 years). The median overall survival of all patients from the time of diagnosis was 16.0 months (CI 95% 13.0-19.0), in LD-SCLC it was 24.0 months (CI 95% 19.6-28.3), and in ED-SCLC it was 12.0 months (CI 95% 9.6-14.4). Twenty-one patients (17.8%) were diagnosed with cerebral recurrence. Five of these presented with metastatic disease within the limbic system. Of these five patients, four had miliary cerebral disease and one had non-oligometastatic disease. The time from PCI to cerebral recurrence ranged from 4 to 27 months. Prednisolone administration varied from 0 to 100 mg/day. Forty-eight patients were not treated with steroids, 64.6% of these patients reported acute toxicity. Of the 36 patients receiving 50 mg prednisolone, only 22.2% had side effects. The most common symptoms during PCI were nausea and headache.
Twenty-one patients out of 118 developed brain metastases after PCI: five of the twenty-one had metastases located in the limbic system. The study showed that prophylactic steroid use might reduce acute toxicity to PCI. Survival data and recurrence rates are comparable to other clinical studies.
- SourceAvailable from: Avi Assouline
Edited by M Hayat, 04/2014; Elsevier., ISBN: 9780128008966
- "Sixteen metastases (2.29%) involved the hippocampus, and 20 (2.86%) involved the rest of the limbic circuit. Another contemporary study is from Denmark (Ramlov et al., 2012). From 2007 to 2010 a total of 118 consecutive patients underwent PCI (25 Gy in 10 fractions). "
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ABSTRACT: Lung cancer remains the leading cause of cancer-related mortality worldwide. The propensity for metastasis to the central nervous system (CNS) is a major clinical hurdle contributing to the low five-year survival rate of advanced disease. CNS metastases significantly outnumber primary brain tumors and carry a dismal prognosis in part due to the inability of therapeutic agents to cross the blood brain barrier. Standard treatment using radiation has been largely ineffective in improving mortality, suggesting the need for new agents targeting the critical metastatic drivers. The genetic and molecular events governing CNS metastasis from the lung are poorly understood at this time. This review highlights genetic events associated with CNS dissemination from the lung and molecular mechanisms associated with CNS metastasis. In vivo model systems that faithfully recapitulate escape from the lung and colonization of the CNS are described as tools for understanding the metastatic phenotype and for testing new therapeutic agents. A deeper understanding of the mechanisms of lung cancer metastasis to the CNS is needed to elucidate novel therapeutic avenues towards the improvement of the mortality associated with advanced stage lung cancer.08/2013; 2(4):273-83. DOI:10.3978/j.issn.2218-6751.2013.03.12
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ABSTRACT: Objective We investigated the correlation between circulating tumor cells and the incidence of brain metastases as a first site of recurrence among patients with small-cell lung cancer after systemic chemoradiotherapy and prophylactic cranial irradiation. In addition, we assessed the contribution of circulating tumor cells for planning the appropriate total dose of prophylactic cranial irradiation for small-cell lung cancer.Japanese Journal of Clinical Oncology 08/2014; 44(10). DOI:10.1093/jjco/hyu109 · 1.75 Impact Factor