The case histories of 22 patients with lung abscess and empyema presenting to Hospital University Sains Malaysia (HUSM) between 1984 and 1989 are reviewed. The presenting features of both lung abscess and empyema were similar. The commonest predisposing factor was pneumonia, and the commonest organism isolated was Staphylococcus aureus but in the majority of cases, no causal organisms were identified. All the patients were treated with antibiotics and in addition, closed chest tube drainage was performed initially in all patients with empyema. Three patients with empyema required additional surgical drainage procedures. Death occurred in one patient with empyema and in one patient with lung abscess. The features, aetiology, treatment and outcome of thoracic empyema and lung abscess are discussed.