Objectives: To investigate the clinical and radiological characteristics and laboratory diagnosis of pulmonary nocardiosis, to improve the recognization and decrease the misdiagnosis of this disease.

• 摘要目的：探讨肺诺卡菌感染的临床表现、影像学特点及相关实验室诊断方法，提高对诺卡菌的认识，减少误诊。