Exclusive Lecture - Pelvic Floor Imaging by Vikas Shah FREE OFFER ENDS TODAY!

Actinomycosis - pulmonary manifestations on chest radiographs

Case contributed by Dr Jayanth Keshavamurthy


Multiple episodes of RUL pneumonia history of tobacco use, concern for post-obstructive pneumonia, please evaluate for possible lung mass"

Patient Data

Age: 55 years
Gender: Male

Spot the abnormal lobe

Frontal and lateral view of the chest demonstrate chronic interstitial lung markings, which are actually more prominent in the right upper lobe and right lower lobe suggestive of scarring. This is stable for 10 years. There is interposition of colon between liver and right hemidiaphragm.


8 years later the chest X ray shows

Right upper lobe findings are similar. Grossly no change.

Final Pathologic Diagnosis on Bronchoscopy in 2007

-  Benign bronchial mucosa demonstrating moderate to severe acute    

  and chronic inflammation, squamous metaplasia and

  micro-organisms consistent with actinomycetes group.


 GMS:  Positively staining filamentous branching bacili

Gram:  Positively staining filamentous branching bacili

-  No evidence of malignancy seen.

Case Discussion

The chest X ray findings are stable for 8 years. It is a microbiology finding.

PlayAdd to Share

Case information

rID: 38716
Published: 30th Jul 2015
Last edited: 14th Sep 2020
System: Chest
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.