Secondary pulmonary haemosiderosis

**Definition:** Secondary pulmonary hemosiderosis is a respiratory disease due to the deposition of hemosiderin-laden macrophages in lungs as a result of repeated alveolar haemorrhage secondary to another disease, especially dysimmunitary disorders (i.e. Heiner syndrome, autoimmune diseases), thrombotic disorders and cardiovascular disorders such as mitral stenosis. It manifests as a triad of haemoptysis, anaemia and diffuse parenchymal infiltrates on chest radiography