A heterogeneous opacity is present in the left upper lobe.
Contrast CT Chest
The CT shows a cavitatory lesion in the left upper lobe, with a mass lesion inside.
He tests positive for Aspergillus precipitins.
Bronchoscopy + Lavage
Bronchoscopy: no abnormalities
Cytology: no malignant cells noted
Microscopy: Silver staining reveals multiple hyphae which branch at acute angles, suggestive of aspergillosis.