A ground glass nodule in the upper lobe of the right lung is a type of pulmonary nodule. A pulmonary nodule is a round-like or irregular hyperdense shadow ≤3 cm in diameter that appears in the lung on a CT scan of the chest. Pulmonary nodules are divided into three categories based on whether they contain a ground glass-like component; ground glass nodules, solid nodules, and mixed density nodules. Pulmonary ground glass nodules are cloudy but well-defined densities in the lungs on CT scans, which resemble ground glass, hence the name. Depending on whether the nodules contain solid components, they can be divided into pure and partially solid glassy nodules. Inflammation, hemorrhage, infection, allergy and even tumors can manifest as ground glass nodules under CT. Pulmonary ground glass nodules, or ground glass nodules, can occur on the left or right side, or in any lobe of the lung. A ground glass nodule in the right lung may be located in a different location than in the other lobes of the lung and does not affect whether the nodule is benign or malignant. When the nodule is combined with malignant signs such as burr, lobarization, pleural wrinkling or inflatable bronchial signs, active clinical intervention is warranted and a visit to a specialized medical institution is recommended to clarify the nature of the lesion so as not to miss the best time for treatment.