Right hilar enlargement and structural disorder after lung cancer surgery may be caused by overlapping of parahilar tissues and structures, thickening of parahilar blood vessels, inflammation or neoplastic lesions. 1. Overlapping of paraportal tissues and structures: a small number of people have congenital clustering of paraportal structures, which may lead to enlarged and disorganized lung hilar even without organic lesions, and can be distinguished by intensification. 2. Thickening of paravalvular blood vessels: Thickening of paravalvular blood vessels refers to the enlargement and structural disorders of the right hilum after lung cancer surgery due to abnormalities of pulmonary arteries and pulmonary veins, and abnormalities of cardiopulmonary function, which affect the blood circulation. 3. Inflammation or tumor lesions: the most common tumor is central lung cancer, inflammation and tumor lesions will cause peripheral inflammatory reaction and lung atelectasis, which will lead to enlargement of the right hilar and structural disorder after lung cancer surgery. If the right lung hilar is enlarged and structurally disturbed after lung cancer surgery, it is recommended to consult doctor in time and adopt corresponding treatment plan under doctor’s guidance.