“…Haemoptysis is caused by excessive collateral circulation, may be self-limiting or massive and life-threatening. A chest radiography, often performed because of recurrent respiratory infections, typically shows an ipsilateral small hemithorax, diminished hilar vasculature, mediastinal shift to the affected side, and elevation of hemidiaphragm [1]. When these findings are present, a contrast-enhanced CT scan of the chest should be performed, which will depict clearly the absent pulmonary artery, the collateral circulation and possibly an associated congenital defect.…”