[An analysis of the clinicopathological features and misdiagnosis of 16 adults pulmonary sequestration].

Objective: To explore the clinicopathological features of adult pulmonary sequestration and summarize the misdiagnosis experiences.

Methods: Data of 16 cases of adult pulmonary sequestration (18 years), who were confirmed by surgery and biopsy in our hospital were collected and reviewed.

Results: The median age of all the patients was 38.5 years. The female seemed to be more likely to suffer from adult pulmonary sequestration (n = 12) with cough to be the most frequent symptom (n = 9). CT scans revealed most of the lesions were located in the left lower lobes of the lungs (n = 9). Half of the lesions were characterized by pulmonary cyst-like changes and/or multiple cystic bronchiectasis (n = 8), followed by soft tissue mass in or out of the lung fields (n = 7). Enhanced CT scans showed abnormal arteries from the systemic circulation. Only two cases were diagnosed as pulmonary sequestration correctly in the primary diagnosis. The remaining were mostly misdiagnosed as pulmonary cyst-like changes with bronchiectasis (n = 6) or tumors (n = 6). According to the findings during surgery, 13 cases were intralobar pulmonary sequestrations; 3 cases were extralobars, whose tissues were all detected dysplasia and chronic inflammatory by histopathological examinations.

Conclusions: The misdiagnosis rate of pulmonary sequestration is high because of its non-specific clinical symptoms. Since it is characterized by abnormal arteries and pulmonary dysplasia, enhanced CT scans should be used as a preferred screening method for suspected cases, especially for those middleaged patients with cystic or mass-like lesions in the left lower lobes of the lungs.