Diffuse pulmonary hemorrhage. 
Diffuse pulmonary hemorrhage is a syndrome consisting of hemoptysis, anemia, and air-space consolidation.  The radiologic appearance is non-specific.  Pulmonary hemorrhage may be due to a number of different causes.  The differential diagnosis and the diagnostic approach are different in the immunologically intact host as compared with the immunocompromised host.  This article reviews the main diagnostic considerations in diffuse pulmonary hemorrhage.