Lung squamous carcinoma, also known as squamous cell carcinoma of the lung, is one of the pathologic types of lung cancer. 1. Epidemiological characteristics: its occurrence is closely related to smoking, so it is more common in men than women. 2. Clinical manifestations: the clinical manifestations of squamous lung cancer are related to the growth site and tumor stage, which can be manifested as coughing, coughing up sputum, hemoptysis, fever, dyspnea, chest pain and so on, and the symptoms are atypical; squamous lung cancer can have no clinical symptoms in the early stage, which is mostly detected by physical examination. 3. Imaging manifestations: Chest CT of squamous lung cancer mostly shows mass shadow, necrosis and cavity formation can be seen in the tumor, and it can also be combined with obstructive inflammation or lung atelectasis. It can also be combined with obstructive inflammation or pulmonary atelectasis. Imaging manifestations should be differentiated from tuberculosis, lung abscess and pneumonia. 4. Treatment: Early stage of squamous lung cancer can be surgically resected; for advanced stage of squamous lung cancer without surgery, systemic chemotherapy, immunotherapy and local radiotherapy can be considered. Warm reminder: squamous lung cancer is a malignant tumor, if diagnosed with squamous lung cancer, one should consult the hospital in time and follow the doctor’s prescription.