Development of a giant bulla after lung volume reduction surgery.

Lung volume reduction surgery (LVRS) is being evaluated in the treatment of emphysema. The proposed mechanisms of improvement are increased elastic recoil of the lung and improved mechanical efficiency of the muscles of respiration. We report a unique patient with emphysema who developed a giant bulla 3 years subsequent to LVRS. The patient underwent extensive evaluation, including measurements of lung mechanics. Bullectomy was performed, but it was unsuccessful. Although the mechanisms behind the development of giant bullous disease remain speculative, heterogeneous improvement in elastic recoil following LVRS may be one of the responsible mechanisms.