• Zhao Wang, Mai-Qing Yang, Wen-Jing Huang, Di Zhang, and Hong-Tao Xu.
• Department of Pathology, the First Hospital and College of Basic Medical Sciences of China Medical University, Shenyang.
• Medicine (Baltimore). 2019 Feb 1; 98 (5): e14315.

RationaleSclerosing pneumocytoma accompanied with other type of tumor in one patient is very rare. Here, we report a case of a sclerosing pneumocytoma mixed with a typical carcinoid tumor in a same neoplasm.Patient ConcernsA 55-year-old woman incidentally detected a space-occupying lesion of right lung in routine health examination. The patient was asymptomatic and there were no positive findings in routine laboratory examination, physical examination, and pulmonary function test. Computed tomography revealed a solitary round mass in the middle lobe of the right lung.DiagnosisThe lesion was diagnosed as a sclerosing pneumocytoma accompanied with a typical carcinoid tumor of the right lung.InterventionThe patient underwent thoracoscopic lobectomy in our hospital.OutcomesThe postoperative course was uneventful.LessonsThis case is rare and noteworthy for a lesion containing two different types of neoplasms, which may cause diagnostic difficulties.

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