“…The volume of expectorated blood has often been used to define episodes of massive hemoptysis, but no uniform cutoff value is agreed upon in the literature [1]. Amounts of expectorated blood ranging from 100 ml/24 h to more than 1,000 ml/24 h [2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19] have been proposed to define massive hemoptysis. Other terms, such as ‘major’ hemoptysis (≥200 ml/24 h) [4,14], severe hemoptysis (≥150 ml/12 h in de Gracia et al [10] and >400 ml/24 h in Khalil et al [19]) and ‘exsanguinating hemoptysis’ [11] (≥1,000 ml total or ≥150 ml/h) have also been employed to describe the extent of bleeding.…”