Lung nodules in the upper lobe of the right lung are not necessarily cancerous, but only have a certain probability of cancer. In addition to cancer, there are also possibilities that they may belong to tuberculosis, fibrous foci, lung cysts and so on. 1. Lung cancer: if it belongs to lung cancer, most of the nodules will show a series of malignant signs, such as irregular edge, lobulation, burr, vacuoles, etc., which need to be diagnosed by pathological puncture. 2. Tuberculosis: tuberculosis balls in the lungs will have corresponding changes, most of them have smooth edges, and satellite foci can be seen around them. 3. Fibrotic foci: belong to the residue after the absorption of inflammation, most of them show wedge-shaped changes, and the foci are stable in the process of review. 4. Pulmonary cysts: benign lesions in the lungs, mainly presenting with fluid density and smooth edges. The discovery of lung nodules in the upper lobe of the right lung, the most important thing is to observe regularly, the lesion increases, you need to consult a doctor in time to observe, if necessary, through the puncture biopsy to determine, under the guidance of the clinician for standardized treatment.