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7 year old Bernese Mountain Dog

May 14, 2015 By Allison Zwingenberger

Today’s case is a 7 year old female neutered Bernese Mountain Dog with cervical mast cell tumor. What is your top differential diagnosis?

R LAT Thorax
L LAT Thorax
DV Thorax

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Findings

There is a well-defined, lobular soft tissue opacity with air bronchograms in the right middle lung lobe. There is a more poorly defined alveolar pattern in the caudal subsegment of the left cranial lung lobe. There is also a mild, diffuse bronchointerstitial pattern present throughout the lungs. The cardiovascular structures, mediastinum, and pleural space appear normal.

Show differential diagnosis…

Differential Diagnosis

  • Right middle lung lobe mass most consistent with histiocytic sarcoma
  • Left cranial lung lobe may also represent neoplasia, or alternatively pneumonia

Show diagnosis…

Diagnosis

Histiocytic sarcoma—diagnosed by fine needle aspirate of the lung mass.

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Filed Under: Canine, Case of the Day, Radiographs, Thorax

Comments

  1. Charlierak says

    July 7, 2015 at 10:20 pm

    Other than breed-specific predisposition of the Histiocytic sarcoma in Bernese Mountain Dog, additional reasons for bringing this condition first is that the metastases of MCT usually take place on the GI,spleen and LN?

    • Allison Zwingenberger says

      July 7, 2015 at 11:01 pm

      This is a very common site for pulmonary histiocytic sarcoma, with specific imaging characteristics that make it the first differential diagnosis. Mast cell tumor is uncommon as a lung mass so that is less likely.

    • Charlierak says

      July 7, 2015 at 11:21 pm

      I found the same mention in the BSAVA Thanks a lot.

    • Charlierak says

      July 7, 2015 at 11:24 pm

      Not exactly same though. Just depiction of HIstiocytic sarcoma in a dog with an example picture.

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