Lung Cancer, Precancerous Condition
Conditions
Keywords
small cell lung cancer, non-small cell lung cancer, precancerous condition
Brief summary
RATIONALE: Screening tests or exams may help doctors find lung cancer sooner, when it may be easier to treat. PURPOSE: This randomized clinical trial is studying screening tests or exams to see how well they work compared to usual care in finding early stage lung cancer in current or past smokers with chronic obstructive pulmonary disease.
Detailed description
OBJECTIVES: Primary * To show that the proportion of lung cancer diagnosed at stage I or II is significantly greater in the surveillance arm than in the control arm. Secondary * Establish whether sputum cytology and/or cytometry can be employed to stratify patients with chronic obstructive pulmonary disease (COPD) according to their risk of developing incidence lung cancer. * Identify patients with pre-invasive lesions in their airways and examine the risk of developing lung cancer in patients harboring these lesions. * Provide an opportunity to archive blood samples from patients under surveillance to enable the identification of markers of disease progression. * Examine the compliance of regular screening among patients in this high-risk group. * Determine the proportion of patients in which it is not possible to provide a sputum screening result. OUTLINE: This is a randomized, controlled, multicenter study. Patients are stratified according to recruiting site, age, gender, smoking history (current vs ex-smoker) and severity of chronic obstructive pulmonary disease (COPD) (mild vs moderate). Patients are randomized to 1 of 2 arms. * Control arm: Patients are managed according to the usual practice of their hospital or general practice for their COPD treatment. They undergo no particular investigations except those that may arise due to a change in their clinical condition. Those patients who are not diagnosed with lung cancer during the course of the study are offered a chest x-ray after 5 years of follow-up. * Surveillance arm: Patients undergo surveillance for 5 years. A sputum sample is collected for cytology and cytometry. If the sputum sample is normal the patient is asked to provide a sputum sample annually. If the sputum sample is abnormal the patient undergoes an annual spiral CT scan followed by autofluorescence bronchoscopy. At bronchoscopy, the following samples are taken: bronchial washings, bronchial brushings, and bronchial biopsies. Bronchoscopy is repeated every 4-12 months depending upon the histology results. If an invasive lesion is found, the patient is referred for treatment via the normal hospital systems. Any remaining sputum sample is stored frozen as part of the tissue bank associated with this trial. Peer Reviewed and Funded or Endorsed by Cancer Research UK.
Interventions
OTHERcytology and cytometry specimen collection procedure
Samples tested and further interventions added if positive
OTHERChest x ray
Patients not diagnosed with lung cancer during the course of the study, will be offered an exit chest x-ray after 5 years or sooner if they withdraw from the trial before 5 years. This could help identify a lung cancer that may not have been associated with symptoms earlier.
PROCEDUREAutofluorescence bronchoscopy
The bronchial tree will be inspected first under white light and then under blue light. All areas that appear abnormal will initially be documented and only sampled when the bronchoscopic examination has been completed.
PROCEDURECT scan
All patients with abnormal sputum cytology and/or cytometry will undergo low dose spiral CT without contrast.
Sponsors
University College, London
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
SCREENING
Masking
NONE
Eligibility
Sex/Gender
ALL
Healthy volunteers
No
Inclusion criteria
DISEASE CHARACTERISTICS: Inclusion criteria: * Meets 1 of the following criteria: * Current smoker, defined as ≥ a 20 pack year smoking history and/or 20 year duration of smoking * Ex-smoker who has quit smoking within the past 8 years AND has ≥ a 20 pack year smoking history and/or 20 year duration of smoking * Mild to moderate chronic obstructive pulmonary disease (COPD) as defined by the GOLD criteria * Mild COPD: FEV\_1/forced vital capacity (FVC) \< 70%; FEV\_1 ≥ 80% of predicted\* * Moderate COPD: FEV\_1/FVC \< 70%; FEV\_1 50-80% of predicted\* NOTE: \*Spirometric values will be obtained post bronchodilator according to the recommendations in the GOLD criteria
Exclusion criteria
* Inadequate lung function (FEV\_1 \< 50% of predicted after bronchodilator) PATIENT CHARACTERISTICS: Inclusion criteria: * Life expectancy must be at least 5 years
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Proportion of lung cancer that is diagnosed as stage I or II | 5 years | In the control arm, it is expected that only 15% of cancers will be detected early. In the surveillance arm, we expect that at the time of the first screen, the detection rate of prevalence cancers will be about 3%, from data reported in CT screening studies |
Secondary
| Measure | Time frame |
|---|---|
| Uptake of screening (the proportion of patients in the surveillance arm who undergo annual screening, among those invited to attend) | 5 Years |
| Proportion of patients in the surveillance arm who have abnormal sputum cytology | 5 Years |
| Proportion of patients in the surveillance arm who have abnormal sputum cytometry | 5 Years |
| Number of patients in the surveillance arm with pre-invasive lesions who develop lung cancer locally and at remote sites within the lung | 5 Years |
| Proportion of failed sputum samples (i.e., where it is not possible to obtain adequate sputum samples) | 5 Years |
| Prevalence of pre-invasive disease in patients in the surveillance arm with abnormal cytometry | 5 Years |
| Death from lung cancer | Up to 15 years |
Countries
United Kingdom
Outcome results
None listed