Allergic Bronchocentric Granulomatosis. Higher power. Sections show muscle, lung with acute inflammation and evidence of organisation with early fibrosis. The bronchial wall can be seen with chronic inflammation and many eosinophils.There is a thickened basement membrane. No definite granulomata are seen.
A 53 year old male with fevers, shortness of breath and a progressive left lower lobe infiltrate, he had a previous history of aspergillosis. A percutaneous lung biopsy was done. All sections were stained with haemotoxylin and eosin. No fungal hyphae were seen with silver staining (not shown).