Background: A discrete, well-marginated, rounded opacity less than or equal to 3 cm in diameter that is entirely encircled by lung parenchyma, does not touch the hilum or mediastinum, and is not connected to pleural effusion, atelectasis, or adenopathy is referred to as a solitary pulmonary nodule. Aim and objectives: The purpose of this study is to ascertain the incidence of benign lesions, primary lung cancer, and single lung metastasis in patients with a solitary lung nodule and a primary extrapulmonary neoplasm.