Abstract
Chronic pulmonary artery narrowing may result from diverse causes; congenital as well as acquired. The relative hypoperfusion of the lung results in hypertrophy of multiple systemic arteries. Such patients can present with recurrent hemoptysis from hypertrophied systemic arteries, most commonly bronchial arteries. These patients remain undiagnosed for a long time because of the lack of awareness of this entity. We present three cases of chronic pulmonary artery narrowing presenting with massive hemoptysis.