TB foci 11mm is not necessary for surgical treatment, benign lesions can be treated with medication; malignant lesions need surgical treatment. 1. Benign lesions: If the lung nodule is 11mm and is diagnosed as benign by lung aspiration pathology, inflammation or tuberculosis is usually considered. Tuberculosis can be considered to receive drug treatment, commonly used drugs include isoniazid, rifampicin and streptomycin, etc.; inflammation-induced, broad-spectrum antibiotic treatment can be applied, such as azithromycin and cefuroxime. 2. Malignant lesions: If malignancy is highly suspected by CT examination of the lungs, surgical treatment should be considered, which can be performed by thoracoscopic wedge resection of the lungs and segmental resection of the lungs, and intraoperative pathological examination should be performed to clarify the diagnosis. In addition, tuberculosis has a certain degree of danger, patients need to actively accept the examination, regular review.