Gestational trophoblastic tumors can cause lung cancer, and if they develop into gestational trophoblastic tumors, lung metastasis can cause secondary lung cancer. Although gravidarians are benign diseases, some of them may develop into gestational trophoblastic tumors, which are malignant tumors and may cause secondary lung cancer by pulmonary metastasis through hematogenous dissemination. If secondary lung cancer occurs, it may be asymptomatic or only have CT, X-ray and other imaging manifestations. Some patients may also have acute onset or chronic persistent chest pain, cough, hemoptysis, dyspnea and other typical symptoms. A few patients may also present with acute pulmonary infarction, etc. If there is any discomfort, it is recommended to seek medical attention in time to avoid progression of the disease.