A Humerus Puzzle

January 4, 2018


Radiograph of an 11 year old male Labrador.


  1. What’s your presumptive diagnosis?
  2. How would you confirm your suspicion?
  3. What else should you do?



  1. Lytic lesion in the left humerus – possible osteosarcoma.
  2. Take a bone biopsy to confirm the diagnosis.
  3. Take a lateral radiograph (see picture) which would have shown a complete fracture of the humerus. Therefore, amputation (and a biopsy) would likely be the next step, as opposed to only a biopsy. Of course, thoracic radiographs are also in order. Morale of the story: there is no such thing as 1 view.

How did you do? Let us know in the comments below.

  1. [Image]: http://www.veterinarypracticenews.com/wp-content/uploads/2018/01/BT1.jpg
  2. [Image]: http://www.veterinarypracticenews.com/wp-content/uploads/2018/01/BT2.jpg

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