[Show abstract][Hide abstract] ABSTRACT: While low-dose CT scans have been shown to detect greater numbers of early lung cancers than conventional CXR, the first randomized trial of CT versus CXR screening in more than 50 000 subjects has shown a 20% reduction in mortality with CT. There are several other randomized trials in progress. CT scanning may be a useful technique for identifying lung cancer at an earlier stage and may reduce mortality. However, before it can be used on a wider scale, issues such as overdiagnosis bias, cost-effectiveness, false positive findings of multiple noncalcified nodules and the willingness of the relevant population to accept CT scanning need to be evaluated. There is still very little information on the cost per life-year saved as a result of CT scanning, as the data to date is very imprecise. There is no evidence that screening programs influence smoking rates despite the inclusion of cessation programs in many trials. Furthermore, if CT screening is adopted, much work is needed to persuade individuals at high risk, mostly current or former heavy smokers with some airflow obstruction, to participate in a screening program.
[Show abstract][Hide abstract] ABSTRACT: Earlier diagnosis of lung cancer is key to reducing mortality. New evidence suggests that smokers have negative attitudes to screening and participation in lung cancer screening trials is poor (<1 in 6 of those eligible). Understanding participation is important since uptake in screening trials is likely to predict uptake in screening programmes. A qualitative study of people accepting and declining participation in the Lung-SEARCH screening trial was conducted. Two questions were addressed: Are the screening methods offered acceptable to patients? Why do some people take part and others decline?
The qualitative study used semi-structured interviews with 60 respondents from three groups: (a) trial participants providing an annual sputum sample; (b) trial participants with a sputum sample showing abnormal cytology and thus undergoing annual CT scanning and bronchoscopy; and (c) those declining trial participation.
Most respondents (48/60, 80%) viewed sputum provision, CT scanning and bronchoscopy as largely acceptable. Those declining trial participation described fear of bronchoscopy, inconvenience of travelling to hospitals for screening investigations and perceived themselves as having low susceptibility to lung cancer or being too old to benefit. Patients declining participation discounted their risk from smoking and considered negative family histories and good health to be protective. Four typological behaviours emerged within those declining: 'too old to be bothered', 'worriers', 'fatalists' and 'avoiders'.
Sputum provision, CT scanning and bronchoscopy are largely acceptable to those participating in a screening trial. However, the decision to participate or decline reflects a complex balance of factors including acceptability and convenience of screening methods, risk perception, altruism and self-interest. Improving practical and changing cognitive aspects of participation will be key to improving uptake of lung cancer screening.
[Show abstract][Hide abstract] ABSTRACT: Lung cancer remains one of the greatest medical challenges with nearly 1.5 million new cases worldwide each year and a growing tobacco epidemic in the developing world. This review summarizes briefly the current status in growing areas of clinical research. The value of screening for early disease is not yet established and trials to see if mortality can be improved as a result are in progress. Better and more accurate staging will both streamline investigation and prove cost-effective once ultrasound-guided biopsy and aspiration of mediastinal nodes become universally accepted. This, allied to the new staging classification, will improve selection of cases for surgery, intensive multimodality therapy and for adjuvant treatment postoperatively. Much still needs to be done to refine staging as within a particular stage group, the outcome shows great variation. More information is needed on the genetic make-up in some groups of tumours and not just their size; that is, more biological data on tumour growth patterns are likely to be at least as discriminating. The place of the stem cell theory of tumorigenesis is also explored in this paper. Finally, targeted therapy for advanced non-small-cell lung cancer is highlighted as a development with early promise, but still much clarification is required, before it can be considered as a universal approach in late disease.
[Show abstract][Hide abstract] ABSTRACT: To evaluate the impact of adjuvant cisplatin-vinorelbine in completely resected non-small cell lung cancer and identify patients likely to benefit from this regimen in the Lung Adjuvant Cisplatin Evaluation (LACE) database. The overall LACE meta-analysis showed survival benefit with cisplatin-based adjuvant chemotherapy (5-year survival benefit of 5.4%, hazard ratio [HR] 0.89, p = 0.004). Subgroup analysis for the cisplatin-vinorelbine regimen was prespecified in the LACE statistical analysis plan. Patients randomized to cisplatin-vinorelbine or observation were the largest subgroup (41%) and the most homogeneous in terms of drug doses and eligibility.
The LACE-vinorelbine cohort included trials evaluating cisplatin-vinorelbine versus observation. Overall survival was the primary end point. Other studies randomizing patients to other chemotherapy or observation (LACE-other) were also evaluated.
The LACE-vinorelbine cohort included 1888 patients from four studies (Adjuvant Navelbine International Trialist Association, Big Lung Trial, International Adjuvant Lung Cancer Trial, and National Cancer Institute of Canada Clinical Trials Group JBR.10). Baseline characteristics were similar to the LACE-other but had fewer patients with stage IA (2% versus 11%). Survival improvement at 5 years was 8.9% with cisplatin-vinorelbine versus observation (HR 0.80, 95% confidence interval: 0.70-0.91, p <0.001). Stage was a significant predictor for survival (test for trend, p = 0.02; benefit at 5 years: 14.7% [stage III], 11.6% [stage II], and 1.8% [stage I]). Similar benefits were seen for disease-free survival (HR 0.75 [0.67-0.85, p <0.001], stage III [HR 0.62, 0.50-0.76], stage II [HR 0.69, 0.57-0.83], and stage I [HR 0.95, 0.767-1.19]). The overall result was statistically superior to LACE-other (LACE other HR 0.95, 0.86-1.05, interaction p = 0.04).
In subgroup analyses, adjuvant cisplatin-vinorelbine provides a superior survival benefit and can be recommended in completely resected stages II and III non-small cell lung cancer.
Journal of thoracic oncology: official publication of the International Association for the Study of Lung Cancer 12/2009; 5(2):220-8. · 4.55 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Cancers rely on angiogenesis for their growth and dissemination. We hypothesized that thalidomide, an oral antiangiogenic agent, when combined with chemotherapy, and as maintenance treatment, would improve survival in patients with advanced non-small-cell lung cancer (NSCLC).
Seven hundred twenty-two patients were randomly assigned to receive placebo or thalidomide capsules 100 to 200 mg daily for up to 2 years. All patients received gemcitabine and carboplatin every 3 weeks for up to four cycles. End points were overall survival (OS), progression-free survival (PFS), response rate, grade 3/4 toxicity, and quality of life (QoL).
The median OS rates were 8.9 months (placebo) and 8.5 months (thalidomide). The hazard ratio (HR) was 1.13 (95% CI, 0.97 to 1.32; P = .12). The 2-year survival rate was 16% and 12% in the placebo and thalidomide arms, respectively. The PFS results were consistent with those for OS. The risk of having a thrombotic event was increased by 74% in the thalidomide group: HR of 1.74 (95% CI, 1.20 to 2.52; P = .003). There were no differences in hematologic toxicities, but a slight excess of rash and neuropathy in the thalidomide group. QoL scores were similar but thalidomide was associated with less insomnia, and more constipation and peripheral neuropathy. In a retrospective analysis, patients with nonsquamous histology in the thalidomide group had a poorer survival: 2-year risk difference of 10% (95% CI, 4% to 16%; P < .001).
In this large trial of patients with NSCLC, thalidomide in combination with chemotherapy did not improve survival overall, but increased the risk of thrombotic events. Unexpectedly, survival was significantly worse in patients with nonsquamous histology.
Journal of Clinical Oncology 09/2009; 27(31):5248-54. · 18.04 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Cancer cells rely on angiogenesis for growth and dissemination, and small cell lung cancer (SCLC) is a highly angiogenic tumor. We evaluated thalidomide, an anti-angiogenic agent, when combined with chemotherapy and as maintenance treatment.
A total of 724 patients (51% with limited and 49% with extensive disease) were randomly assigned to receive placebo or thalidomide capsules, 100-200 mg daily for up to 2 years. All patients received etoposide and carboplatin every 3 weeks for up to six cycles. Endpoints were overall survival, progression-free survival, tumor response rate, toxicity, and quality of life (QoL). Hazard ratios (HRs) for comparing thalidomide against placebo were estimated using Cox regression modeling. Statistical tests were two-sided.
The median overall survival was 10.5 months (placebo) and 10.1 months (thalidomide) (HR for death = 1.09, 95% confidence interval [CI] = 0.93 to 1.27; P = .28). Among patients with limited-stage disease, there was no evidence of a survival difference (HR for death = 0.91, 95% CI = 0.73 to 1.15), but among patients with extensive disease, survival was worse in the thalidomide group (HR for death = 1.36, 95% CI = 1.10 to 1.68). Progression-free survival rates were also similar in the two groups (HR = 1.07, 95% CI = 0.92 to 1.24). Thalidomide was associated with an increased risk of having a thrombotic event, mainly pulmonary embolus and deep vein thrombosis (19% thalidomide vs 10% placebo; HR = 2.13, 95% CI = 1.41 to 3.20; P < .001). There were no statistically significant differences between treatments in hematological and nonhematological toxic effects, except more patients in the thalidomide group had rash, constipation, or neuropathy. Overall, QoL scores were similar in the two treatment groups, but thalidomide was associated with less insomnia and diarrhea and more constipation and peripheral neuropathy.
In this large randomized trial, thalidomide in combination with chemotherapy did not improve survival of patients with SCLC but was associated with an increased risk of thrombotic events.
[Show abstract][Hide abstract] ABSTRACT: Mediastinal staging of non-small-cell lung cancer (NSCLC) is of paramount importance. It distinguishes operable from inoperable disease, guides prognosis and allows accurate comparison of outcomes in clinical trials. Noninvasive imaging modalities for mediastinal staging include CT, PET and integrated PET-CT. Mediastinoscopy is considered the current gold standard; however, each of these techniques has limitations in sensitivity or specificity. These inadequacies mean that 10% of operations performed with curative intent in patients with NSCLC are futile, owing to inaccurate locoregional lymph-node staging. Endoscopic and endobronchial ultrasound-guided mediastinal lymph-node aspiration are important and promising innovative techniques with reported sensitivities and specificities higher than standard investigations. The role of these techniques in mediastinal lymph-node staging is evolving rapidly and early data suggest that they may diminish the need for invasive surgical staging of the mediastinum. Furthermore, these are outpatient procedures that do not require general anesthesia and may be combined safely in the same sitting, for optimal accuracy of mediastinal staging. We propose a new algorithm for the diagnosis and staging of NSCLC, based on the current evidence, which incorporates endoscopic and endobronchial ultrasound as a first investigation after CT in patients with intrathoracic disease.
[Show abstract][Hide abstract] ABSTRACT: The combination of cisplatin and etoposide (PE) has been a standard treatment for patients with poor-prognosis small cell lung cancer (SCLC). This non-inferiority design trial aimed to determine whether the combination of gemcitabine and carboplatin (GC) results in similar survival but is less toxic with better quality of life.
Previously untreated patients with SCLC with extensive disease or limited stage with poor prognostic factors were randomly assigned to six 3-weekly cycles of GC or PE.
241 patients (121 GC, 120 PE) were recruited, of which 216 (90%) had died. There was no difference in overall survival (HR 1.01, 95% CI 0.77 to 1.32). Median survival with GC and PE was 8.0 and 8.1 months, respectively. Median progression-free survival was 5.9 months with GC and 6.3 months with PE. Grade 3 or 4 myelosuppressions were more frequent with GC (anaemia: 14% GC vs 2% PE; leucopenia: 32% GC vs 13% PE; thrombocytopenia: 22% GC vs 4% PE), but these were not associated with increased hospital admissions, infections or fatalities. Grade 2-3 alopecia (68% PE vs 17% GC) and nausea (43% PE vs 26% GC) were more frequent with PE. Patients given GC received more chemotherapy as outpatients (89% GC vs 66% PE of treatment cycles). In QoL questionnaires, more patients receiving PE reported being upset by hair loss (p = 0.004) and impaired cognitive functioning (p = 0.04).
GC is as effective as PE in terms of overall survival and progression-free survival and has a toxicity profile more acceptable to patients. Trial registration number: ISRCTN 39679215.
[Show abstract][Hide abstract] ABSTRACT: Several recent trials have shown a significant overall survival (OS) benefit from postoperative cisplatin-based chemotherapy in patients with non-small-cell lung cancer (NSCLC). The aim of the Lung Adjuvant Cisplatin Evaluation was to identify treatment options associated with a higher benefit or groups of patients who particularly benefit from postoperative chemotherapy.
Individual patient data were collected and pooled from the five largest trials (4,584 patients) of cisplatin-based chemotherapy in completely resected patients that were conducted after the 1995 NSCLC meta-analysis. The interactions between patient subgroups or treatment types and chemotherapy effect on OS were analyzed using hazard ratios (HRs) and log-rank tests stratified by trial.
With a median follow-up time of 5.2 years, the overall HR of death was 0.89 (95% CI, 0.82 to 0.96; P = .005), corresponding to a 5-year absolute benefit of 5.4% from chemotherapy. There was no heterogeneity of chemotherapy effect among trials. The benefit varied with stage (test for trend, P = .04; HR for stage IA = 1.40; 95% CI, 0.95 to 2.06; HR for stage IB = 0.93; 95% CI, 0.78 to 1.10; HR for stage II = 0.83; 95% CI, 0.73 to 0.95; and HR for stage III = 0.83; 95% CI, 0.72 to 0.94). The effect of chemotherapy did not vary significantly (test for interaction, P = .11) with the associated drugs, including vinorelbine (HR = 0.80; 95% CI, 0.70 to 0.91), etoposide or vinca alkaloid (HR = 0.92; 95% CI, 0.80 to 1.07), or other (HR = 0.97; 95% CI, 0.84 to 1.13). Chemotherapy effect was higher in patients with better performance status. There was no interaction between chemotherapy effect and sex, age, histology, type of surgery, planned radiotherapy, or planned total dose of cisplatin.
Postoperative cisplatin-based chemotherapy significantly improves survival in patients with NSCLC.
Journal of Clinical Oncology 08/2008; 26(21):3552-9. · 18.04 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: This pooled analysis was undertaken to assess the efficacy and toxicity of adjuvant cisplatin-based chemotherapy in elderly patients with non-small-cell lung cancer (NSCLC).
We used individual patient data from 4,584 patients enrolled onto five trials of cisplatin-based chemotherapy who form the basis for the Lung Adjuvant Cisplatin Analysis (LACE) pooled analysis. Patient and treatment characteristics, overall and event-free survival, cause-specific mortality, chemotherapy toxicity and delivery were compared among three age groups: 3,269 young (71%; < 65), 901 midcategory (20%; 65 to 69), and 414 elderly patients (9%; >or= 70). Log-rank tests stratified by trials were used with a test for trend to study the effect of chemotherapy on survival according to age.
The hazard ratio (HR) of death for the young patients was 0.86 (95% CI, 0.78 to 0.94), 1.01 for the midcategory (95% CI, 0.85 to 1.21), and 0.90 for elderly patients (95% CI, 0.70 to 1.16; test for trend: P = .29). The HR for event-free survival was 0.82 for young (95% CI, 0.75 to 0.90), 0.90 for the midcategory (95% CI, 0.76 to 1.06), and 0.87 for elderly patients (95% CI, 0.68 to 1.11; test for trend: P = .42). More elderly patients died from non-lung cancer-related causes (12% young, 19% midcategory, 22% elderly; P < .0001). No differences in severe toxicity rates were observed. Elderly patients received significantly lower first and total cisplatin doses, and fewer chemotherapy cycles (chi(2) P < .0001).
Adjuvant cisplatin-based chemotherapy should not be withheld from elderly patients with NSCLC purely on the basis of age.
Journal of Clinical Oncology 07/2008; 26(21):3573-81. · 18.04 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: In most cases lung cancer is incurable, but treatment is prolonging life for many and sustaining quality of life. Inevitably, disease-related symptoms develop with disease progression, and it can be difficult to differentiate these from treatment-induced complications. This is particularly true for pulmonary complications because tumor progression occurs most frequently in the lungs, and separating the effects of the disease from those induced by treatment (chemotherapy, radiotherapy) is often very difficult. This chapter identifies the main complications around surgical resection of lung cancer, highlighting the importance of expert postoperative care. For palliative treatments such as radiotherapy and chemotherapy, complications are related to the planned intensity of proposed therapy, the performance status of the patients, and patient age. Treatment of the elderly sufferer, now representing almost 50% of new cases, is poorly researched, but therapy-related complications are commoner in those aged over 70 years by ~20% when compared with their younger counterparts. Even during palliative care great attention has to be taken to minimize side effects of commonly used medications.
Seminars in Respiratory and Critical Care Medicine 07/2008; 29(3):302-17. · 2.75 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Guidelines issued by the National Institute for Clinical Excellence (NICE) in the England and Wales recommend that rapid access to (18)F-deoxyglucose positron emission tomography (FDG-PET) is made available to all appropriate patients with non-small-cell lung cancer (NSCLC). The clinical evidence for the benefits of PET scanning in NSCLC is substantial, showing that PET has high accuracy, sensitivity and specificity for disease staging, as well as pre-therapeutic assessment in candidates for surgery and radical radiotherapy. Moreover, PET scanning can provide important information to assist in radiotherapy treatment planning, and has also been shown to correlate with responses to treatment and overall outcomes. If the government cancer waiting time targets are to be met, rapid referral from primary to secondary healthcare is essential, as is early diagnostic referral within secondary and tertiary care for techniques such as PET. Studies are also required to explore new areas in which PET may be of benefit, such as surveillance studies in high-risk patients to allow early diagnosis and optimal treatment, while PET scanning to identify treatment non-responders may help optimise therapy, with benefits both for patients and healthcare resource use. Further studies are needed into other forms of lung cancer, including small-cell lung cancer and mesothelioma. In conclusion, PET scanning has the potential to improve the diagnosis and management of lung cancer for many patients. Further studies and refinement of guidelines and procedures will maximise the benefit of this important technique.
Lung Cancer 02/2008; 59(1):48-56. · 3.39 Impact Factor