Swyer-James-Macleod Syndrome: A Rare Entity.

Swyer-James-MacLeod syndrome is a radiological entity characterised by hyperlucency of one or more lobes or of the entire lung associated with decreased number and diameter of ipsilateral peripheral pulmonary vessels resulting in difficult visibility of the arterial network, and unobstructed bronchial system. We report the case of a 12-year-old girl who presented with chief complaint of pain in the chest. Chest radiograph (postero-anterior view) showed hyperlucent left lung field with increased lung volume and shift of the mediastinum to the right side. Contrast-enhanced computed tomography (CECT) of the chest showed hyperlucency and diminished vascularity in the upper lobe and lingula of left lung with hyperinflation of the pulmonary parenchyma. On the basis of clinical and radiological findings, the patient was diagnosed to have Swyer-James-MacLeod syndrome.