PURPOSE: Right middle lobe syndrome(RMLS) is defined as a transient or chronic and recurrent atelectasis of the right middle lobe. There are various causes associated with RMLS. Then the cause of collapse may be quite different from between each country. So we studied the causes of RMLS at a university hospital in Korea for last 2 years.
METHODS: Eighty eight patients(M:F = 64:24, mean age: 67.2) revealed consistent radiographic findings compatible with a right middle lobe collapse were underwent bronchoscopy in Gyeongsang University Hospital from January 2005 to December 2007. The clinical characteristics and causes of RMLS in these patients were retrospectively reviewed.
RESULTS: Tuberculosis was most common cause (endobronchial tuberculosis in 22 cases and pulmonary tuberculosis in 1 case (26.1%). The other causes were bronchial stenosis by benigh fibrotic changes in 19 cases (21.5%), anthrcofibrosis in 13 cases (14.8%), pneumonia in 11 cases (12.5%), lung cancer in 10 cases (11.4%). The bronchoscopic findings were mucosal changes in 35 cases (39.8%), fibrotic stenosis in 8 cases (11.4%), a mass like lesion in 7 cases (8.0%).
CONCLUSION: The most common cause was mainly emdobronchial tuberculosis. Mucosal edema with hyperemic changes were most common findings with bronchoscopy.
CLINICAL IMPLICATIONS: Endobronchial tuberculosis was most common cause for the RMLS in Korea. This finding may be useful for managing the right middle lobe syndrome patients in Korea.
DISCLOSURE: Young Hwang, No Financial Disclosure Information; No Product/Research Disclosure Information