[False positive 18F-FDG PET/CT findings mimicking malignant disease in patients with pneumoconiosis (due to three case reports)].

Besides the risk of developing pneumoconiosis and chronic obstructive pulmonary disease, potential lung cancer risk may also increase due to exposure to silica and other carcinogens. Patients with hemoptysis symptom referred to our clinic depending on different forms of mass images in their thorax computerize tomography (CT) scan with the suspicion of coal-worker pneumoconiosis and lung cancer were hospitalized for investigation and treatment. The results of routine tests, sputum acid-fast bacilli and sputum cytology were evaluated as normal.