Between 1974 and 1981, 20 patients had surgical treatment for bullous emphysema. There were 15 males and five females with a mean age of 40 years. The majority of patients had symptomatic respiratory disease, were smokers and had a past history of lung disease. In all cases bullae were visible on chest X-ray, the primary diagnostic investigation, and simple spirometry was used to assess lung function pre- and postoperatively. Cyst resection was performed in 14 cases (two bi-laterally) and pleurodesis was added in six of these cases. Lobectomy was performed in four patients and in two a pedunculated cyst was simply ligated and excised. There were no deaths and morbidity was acceptably low. Vital capacity (VC), Forced expiratory volume in 1 s (FEV1) and FEV1:VC ratio were all significantly improved with surgery though the correlation of subjective and objective results was variable. Surgery is appropriate for symptomatic patients with bullae visible on chest X-ray and asymptomatic patients with rapidly enlarging bullae occupying more than 30% of a hemithorax.