The role of the implementation of policies for the prevention of exposure to Radon in Brazil-a strategy for controlling the risk of developing lung cancer.

Lung cancer is the leading cause of cancer death in the United States and other industrialised countries. The most important risk factor is active smoking. However, given the increased incidence of lung cancer in non-smokers, it is necessary to improve knowledge regarding other risk factors.

Interpretation of PET/CT findings in patients with advanced lung cancer who have undergone pleurodesis.

A consensus has not yet been reached for the ideal moment to carry out pleurodesis in patients with malignant pleural effusion among the majority of centres, especially those which don't specialise in oncologic treatment. The PET (positron emission tomography)/CT (computed tomography) used in the staging of patients with non-small-cell lung cancer (NSCLC) and small-cell lung cancer (SCLC) has caused controversy when used in the evaluation of therapeutical response and in detection of recurrence in patients with pleurodesis. For not distinguishing between inflammatory and neoplasic processes while using PET or CT, suspicion of pleural involvement can result in the indication for invasive diagnostic procedures or inadequate exchange of therapy.