Feline injection-site sarcoma: past, present and future perspectives

Area of Science:

• Veterinary Medicine
• Oncology
• Immunology

Background:

• Feline injection-site sarcomas (FISS) emerged in the early 1990s, initially linked to vaccinations.
• Research now indicates chronic inflammation, influenced by genetics, is the primary cause of FISS.
• FISS are infiltrative tumors with a high rate of local recurrence, despite low metastatic potential.

Purpose of the Study:

• To review the current understanding of Feline injection-site sarcomas (FISS) etiology, diagnosis, and treatment.
• To highlight the shift in understanding FISS causes from vaccination to chronic inflammation.
• To explore future therapeutic avenues based on molecular pathogenesis and immunomodulation.

Main Methods:

• Literature review of studies on Feline injection-site sarcomas (FISS) since the early 1990s.
• Analysis of etiological factors, including vaccination history, chronic inflammation, and genetic predispositions.
• Evaluation of diagnostic and therapeutic strategies, including imaging, surgery, radiotherapy, and chemotherapy.

Main Results:

• The etiology of FISS is multifactorial, with chronic inflammation being the main driver, not solely vaccinations.
• Individual genetic factors contribute to FISS development.
• Multimodal treatment is standard, but local recurrence remains a challenge.

Conclusions:

• Advances in FISS understanding have slowed, necessitating further research into molecular pathogenesis.
• Targeting the immune system and developing novel drugs show promise for future FISS therapies.
• Improved diagnostic imaging aids in surgical planning and patient management for FISS.