Results of surgical treatment for secondary spontaneous pneumothorax according to underlying diseases

Abstract

OBJECTIVES: The outcome of surgical treatment for secondary spontaneous pneumothorax (SSP) has rarely been investigated. METHODS: We retrospectively reviewed 183 patients who underwent surgery for SSP. We categorized the patients into three groups according to underlying diseases: Group A (chronic obstructive pulmonary disease), Group B (interstitial pneumonia [IP]) and Group C (others). We defined treatment success as surgery without hospital mortality, postoperative complications, death within 6 months or ipsilateral recurrence of pneumothorax within 2 years. We assessed the risk factors for unsuccessful treatment using a Cox regression hazard model. RESULTS: There were 123 patients in Group A, 20 in Group B and 40 in Group C. The hospital mortality rates were 2, 15 and 0% in Groups A, B and C, respectively. The hospital mortality, morbidity and pneumothorax recurrence rates in the IP group were higher than in the other groups. The 5-year overall survival rates were 78, 32 and 84% in Groups A, B and C, respectively; the prognosis of the IP group was significantly poorer. The treatment success rates were 86, 45 and 83% in Groups A, B and C, respectively. SSPs caused by IP and SSPs requiring open surgery were identified as the risk factors for unsuccessful treatment. CONCLUSIONS: Surgery for SSP caused by underlying diseases other than IP yielded favourable results. However, a careful examination of surgical indication and a realistic disclosure for informed consent are required for patients with SSP caused by IP, because of the high treatment failure rate.