Fig. 1

FISS are malignant, locally invasive tumors. a The brackets in the cat illustration depict the recommended sites for vaccine administration on the distal limbs. In the event that FISS develops, the tumor can be treated with limb amputation. b Photograph of FISS on the right hip of a 3 year-old male castrated Domestic Shorthair cat. c Coronal reconstruction of a CT scan of FISS in the subcutaneous tissues of the left thorax of a 9 year-old female spayed Domestic Shorthair cat. The arrow is pointing to the tumor