Lung tumors are neoplastic lung nodules. These include:Primary tumors of the lung/pulmonary system: Bronchial leiomyoma, a rare, benign tumor Lung cancer,[2][3][4][5][6] the term commonly used to refer to carcinoma of the lung Pulmonary carcinoid tumor Pleuropulmonary blastoma Neuroendocrine tumors of the lung[7] Lymphomas of the lung.[8] Sarcomas of the lung.[9] Some rare vascular tumors of the lung[8] Non-lung tumors which may grow into the lungs: Mediastinal tumors Pleural tumors Metastasis or secondary tumors/neoplasms with other origin: Metastasis to the lung

Reference
Wiki: Lung tumor