Idiopathic Pulmonary Hemosiderosis By Joyce Lee, MD, MAS, University of Colorado School of Medicine Reviewed / Revised Sep 2021 | Modified Sep 2022 View Patient Education Symptoms and Signs Diagnosis Treatment Idiopathic pulmonary hemosiderosis is a rare disease that causes recurrent diffuse alveolar hemorrhage with no detectable underlying disorder; it occurs mainly in children < 10 years.