Ninety (62%) of feline OSAs detailed in this study arose from the skeleton, and 55 (38%) arose from extraskeletal sites.
Fifty OSAs originated in the appendicular skeleton, and 40 OSAs originated in the axial skeleton.
Extraskeletal OSA sites included subcutaneous sites (n=44), with an apparent prevalence for sites commonly used for vaccination.
Other locations included ocular/orbital (n=4), oral (n=3), intestinal/omental (n=3), and mammary sites (n=1).
Survival data was available for 74 cases.
When considered as a group, cats with either appendicular (mean, 11.8 mos) or extraskeletal (mean, 12.67 mos) OSA survived longer than those with axial (mean, 6.07 mos) OSA.
Regardless of the type of feline OSA, aggressive surgical excision with or without ancillary therapy appeared to be the most effective form of treatment.
Source: Heldmann E, Anderson MA, Wagner-Mann C. (2000): Feline osteosarcoma: 145 cases (1990-1995). In: J Am Anim Hosp Assoc. 2000 Nov-Dec;36(6):518-21.
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