Recurrent Exacerbations of Chronic Obstructive Pulmonary Disease Reveal Swyer-James-MacLeod Syndrome in a 63-year-old Patient.

Swyer-James-Macleod syndrome is an infrequent clinical condition characterized by unilateral hyperlucent lung as a complication following infectious bronchiolitis obliterans, typically diagnosed during childhood. However, in some patients, the diagnosis may be confirmed in adulthood. The syndrome can be misdiagnosed with other lung disorders such as asthma, pulmonary embolism, and pneumothorax, leading to inappropriate management and worse outcome. We present a case of Swyer-James-MacLeod syndrome, diagnosed in a 63-year-old man, with frequent hospitalisations due to chronic obstructive pulmonary disease (COPD) exacerbations without a history of significant lung infection in childhood. Complications of Swyer-James-MacLeod syndrome include recurrent infections, lung abscess, pneumothorax, and pulmonary hypertension. The syndrome should always be considered in adults with recurrent respiratory infections or pulmonary hyperlucency on chest imaging to prevent a delay in correct diagnosis and improper treatment.