Pulmonary metastatic tumor

Pulmonary metastatic tumor refers to malignant tumors originating outside the lungs that metastasize to the lungs through certain pathways, and also includes tumors that metastasize from a primary site within the lung to other parts of the lung. Excluding metastasis of primary lung cancer itself, the most common primary tumors associated with this disease are breast cancer, gastrointestinal tumors, kidney cancer, melanoma, sarcoma, lymphoma, leukemia, and ovarian cancer. The vast majority of patients with this disease have no early symptoms, while a few may experience irritating cough, bloody sputum, and chest and back pain.