Bella, a 4-year-old female pit bull terrier mix, was diagnosed with an infiltrative lipoma in her right shoulder area in early 2025. Owners Paul and Kristy Lewis took her to two surgeons to discuss removal of the lipoma, a benign tumor of fatty tissue. Infiltrative lipomas can invade into local structures including the surrounding muscles. On Bella, the tumor was infiltrating the muscle down to the humerus bone and was continuing to grow. This made complete surgical excision nearly impossible.
Both surgeons suggested limb amputation.