The patient was admitted to the hospital on 2010-10 with the main reason of finding a lung occupancy for more than 4 months. The patient was treated with surgery in our hospital more than 4 months ago, and the preoperative chest X-ray revealed “right lower lung nodule shadow”. The CT value was 41.1, and the enhancement scan showed uniform enhancement of the lesion in the lower lobe of the right lung. A benign lesion was considered, and the patient was admitted for further treatment without significant weight loss. Since the onset of the disease, the patient had no fever, coughing up blood, wheezing, chest pain, or weakness. The patient was considered to have a benign right lower lung lesion with a high probability of sclerosing hemangioma, and under adequate preoperative preparation, thoracoscopic resection of the right lower lung mass was performed. The postoperative recovery was smooth. Chest X-ray and chest CT are shown below: The imaging performance of this patient is exceptional —– The mass is regular in shape, clear in boundary, uniform in density, uniformly enhancing and coin-like. The pathology is a clear cell tumor containing more glycogen, which is less common and mostly seen in the lower lung. Benign clear cell tumors have a common name: glycogenoma.