Pulmonary nocardiosis

Case contributed by A.Prof Frank Gaillard


Pulmonary nodule.

Patient Data

Age: 60 years
Gender: Female

There is a 20mm nodular lesion within the LUL which is PET avid.

Case Discussion



Sections show fragments of lung parenchyma and bronchial mucosa. Mostly in the parenchyma there is a moderate infiltrate of mononuclear chronic inflammatory cells, mostly macrophages, with lesser numbers of eosinophils and rare neutrophils. The inflammatory infiltrate is both within the alveolar spaces and the alveolar septa. Granulomata are not identified. There is no evidence of malignancy. PAS and ZN stains are negative for fungi and acid fast bacilli respectively.

DIAGNOSIS: Left upper lobe biopsy: Non-specific active chronic inflammation.

Bronchial washings

Gram positive bacilli : Nocardia species

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Case information

rID: 23324
Published: 6th Jun 2013
Last edited: 1st Nov 2015
System: Chest
Inclusion in quiz mode: Included

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