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Veterinary Radiology

Teaching and learning about veterinary diagnostic imaging.

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12 year old German Shepherd cross

February 29, 2016 By Allison Zwingenberger Leave a Comment

Today’s case is a 12-year-old female neutered German Shepherd cross with coughing for one week. What are your differential diagnoses?

L LAT Thorax
R LAT Thorax
DV Thorax
CT Lung window
CT Soft tissue window

Show findings...

Findings

On all three radiographic projections, there is a cavitary mass in the right caudal lung lobe. It is best seen on the left lateral projection and contains soft tissue opacity as well as gas lucency. On the d/v projection, the soft tissue opacity is on the lateral side of the lesion, indicating that it may be tissue rather than fluid. The remainder of the thorax appears normal.

CT images in a lung and soft tissue window are available. The mass is cavitary and contained within the right caudal lung lobe. The contents are soft tissue with mineralized material and a small fluid component, as evidenced by the horizontal gas fluid interface in the lower right portion of the mass.

Show differential diagnosis…

Differential Diagnosis

  • neoplasia
  • abscess
  • granuloma
  • hematoma
  • focal bronchiectasis

Show diagnosis…

Diagnosis

Pulmonary adenocarcinoma

Show discussion…

Discussion

The mass is visible best on the left lateral projection because the right lung is then filled with air, providing better surrounding contrast. If you were suspicious of fluid contents of the mass, a horizontal beam radiograph could help to diagnose this.

Given the age of the animal, a primary lung tumor is the most likely differential diagnosis.

Filed Under: Canine, Case of the Day, CT/MRI, Radiographs, Thorax

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Recent Comments

  • filipp: Good case, I missed the linear foreign body in the trachea
  • filipp: Great case
  • logan: How can we be positive about that opacity on the 6th ribs being nothing more that a summation artifact?
  • edevis: Thank you for the interesting case again. A non “radiologic” comment: vizsla is spelled with the...
  • Anna N: Hi, I was just wandering what this ‘ linear mineral density separated from the joint surface’...

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