[Antibiotic-resistant pneumonia].

A 77-year-old lady with malaise, cough, weight loss, an elevated ESR and bilateral patchy infiltrates on the chest X-ray is described. The symptoms progressed inspite of antibiotic treatment. On the basis of clinical findings, transbronchial biopsy, bronchoalveolar lavage and lung function tests the diagnosis of a bronchiolitis obliterans, organizing pneumonia (BOOP) was established. The clinicopathological entity of BOOP, its differential diagnosis and treatment are discussed.