肺内孤立性病灶主要包括肺部良、恶性肿瘤、结核球及肺部炎性肿块等。以CT检查并经临床和／或病理确诊的肺内孤立性病灶71例作为研究对象，对其进行回顾性研究。71例中包括肺癌63例，肺结核球5例，炎性假瘤1例，转移瘤1例和肺囊肿1例。研究结果表明：肺内孤立性病灶依据其特征CT表现并结合临床大多数能作出正确诊断。 Pulmonary solitary lesions include lung benign and malignant tumors, tuberculome and pulmonary inflammatory mass. 71 cases of solitary pulmonary lesions diagnosed by CT and clinically and / or pathologically diagnosed were studied retrospectively. 71 cases included 63 cases of lung cancer, 5 cases of tuberculosis ball, 1 inflammatory pseudotumor, 1 case of metastatic tumor and 1 case of pulmonary cyst. The results show that: Pulmonary solitary lesions based on its characteristic CT findings combined with clinical most can make the correct diagnosis.