Pain management consisted initially of ibuprofen (15mg/lb), then Metacam (2 drops daily), then prednisone, and finally Tylenol (90mg/lb). Prednisone was continued to minimize growth and provide comfort. The Baytril and doxycycline were continued.
In an effort to reverse/stabilize her weight loss her dietary intake was increased with moderate amounts of Ensure, avocado, scrambled eggs, and cooked oatmeal.
For safety and ease she was placed, along with two female cage mates, in a one-story cage with smooth ramp to a low shelf.
The mass from the left hind limb consists of pleomorphic neoplastic plump spindle-shaped to polygonal osteoblasts forming sheets and broad interlacing bundles, surrounding coalescing lakes of osteoid which is variable well mineralized, and with foci of osteocartilaginous metaplasia. Tumor cells have moderate anisocytosis and anisokaryosis, mitotic figures average one per high power field.
The left photo is of Zinnia showing a normal left hind limb one year before the mass began to develop. The middle photo was taken one year later directly after a fine needle aspiration was performed. The last photo shows mass size during that same month.
These three photos show continued growth of the mass one month following fine needle aspiration.
These two photos were taken prior to euthanasia, and approximately 5 months from the initial diagnosis. The mass on the left hind limb at this time was approximately the size of a golf ball. Histopathology confirmed osteosarcoma.
Veterinarian- Paul Palmetier, DVM
Pathologist- Shane Stiver, DVM
Case history and Photos courtesy of Carolyn Sekela RNC-e.
Posted on February 27, 2010, 22:29,
Last updated on April 10, 2010, 18:14