Vanishing lung syndrome a rare cause of dwindling of lungs in children with pulmonary tuberculosis.

Vanishing lung syndrome (VLS) or idiopathic giant bullous disease is a rare condition characterized by giant emphysematous bullae, classically presenting as a slowly enlarging bulla that compresses normal lung parenchyma and causes mediastinal shift, leading to increasing dyspnea and reduced exercise tolerance. Intermittent sudden worsening of symptoms may be seen because of secondary pneumothorax due to rupture of these bullae. Here we present three cases of vanishing lung syndrome in children due to tuberculosis (TB). Reports on VLS due to TB are bare minimum. In contrast to most of the published case reports, our cases had a moderate to rapid progression, bilateral extensive bullae and isoniazid which has been traditionally thought to be the causative factor was not used in one of our patients. All three are female patients arising new horizons of research regarding whether there is any sex predominance.