DEVELOPMENT AND OUTCOME OF FELINE INJECTION – SITE SARCOMA IN AN ADULT CAT – CASE REPORT

Feline injection – site sarcomas (FISS) are aggressively behaving fibrosarcomas with a rate of metastasis ranging from 10 to 25%. The main treatment of soft tissue sarcomas is surgical excision with clean margins and subsequent radiotherapy and systemic chemotherapy. We present a case of an adult male cat with recurrent fibrosarcoma, which anamnesis and aggressive tumor development pointed to FISS. A fine needle biopsy first suggested and then histopathology confirmed that diagnose. Two months after the surgery a new tumor mass appeared on the site of the excision. The rapidly growing tumor penetrated the abdomen wall, occupying almost entire abdomen, affecting the internal organs and the right lumbar region muscles, observed by a conventional X-ray examination. A developing central necrosis provoked fistulation and formation of a large wet ulcerative wound in the state of a constant inflammation and tissue disintegration. The local treatment failure and the progressing poor general condition leaded to carry out a humane euthanasia of the animal