Invasive pulmonary aspergillosis Invasive pulmonary aspergillosis. a) Pulmonary parenchyma with necrosis and pulmonary haemorrhage and Aspergillus hyphae (haematoxylin and eosin 100×). b) Branching Aspergillus hyphae involving lung parenchyma (Grocott Methenamine silver fungus stain 200×). Invasive pulmonary aspergillosis. a) Pulmonary parenchyma with necrosis and pulmonary haemorrhage and Aspergillus hyphae (haematoxylin and eosin 100×). b) Branching Aspergillus hyphae involving lung parenchyma (Grocott Methenamine silver fungus stain 200×). Images courtesy of Dr. Mousa Al-Abbadi (East Tennessee State University, Johnson City, TN, USA). M. Kousha et al. Eur Respir Rev 2011;20:156-174 ©2011 by European Respiratory Society