A fatal outcome E. Septate fungi with regular dichotomous branching found in affected tissues. Infection in sites other than the lungs has been demonstrated in man. The histology is that of a pyogenic infection. Infection rarely occurs when the helper T cell level is greater than 400 cells per microliter.
Definitive diagnosis requires culture of lung biopsy material.
A 60-year old man with a 30 year history of smoking presents with fever, cough and mucopurulent sputum. On the x-ray a left hilar mass measuring 6 cm in diameter was seen. Left lower lobe appeared consolidated by the xray. There was fluid in the left hemithorax. The bronchial biopsy revealed small atypical cells with hyperchromatic nuclei and scant cytoplasm.