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Feline Injection-Site Sarcoma.

I Porcellato1, L Menchetti1, C Brachelente1

  • 11 Department of Veterinary Medicine, University of Perugia, Perugia, Italy.

Veterinary Pathology
|December 23, 2016
PubMed
Summary
This summary is machine-generated.

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Feline injection-site sarcoma (FISS) is aggressive, with frequent recurrence. Tumor size and mitotic count, not MMP-2, MMP-9, or TIMP-2 expression, appear to be reliable prognostic factors for FISS recurrence.

Area of Science:

  • Veterinary Pathology
  • Oncology
  • Biochemistry

Background:

  • Feline injection-site sarcoma (FISS) is an aggressive tumor linked to chronic inflammation at injection sites.
  • Local recurrence is common after surgical removal of FISS.
  • Gelatinases (MMP-2, MMP-9) and TIMP-2 are key in extracellular matrix remodeling and tumor invasiveness.

Purpose of the Study:

  • To investigate the immunohistochemical expression of MMP-2, MMP-9, and TIMP-2 in FISS.
  • To assess the prognostic value of MMP-2, MMP-9, and TIMP-2 in FISS.
  • To evaluate other potential prognostic markers including tumor size, STS grading, depth, margins, and Ki-67.

Main Methods:

  • Immunohistochemistry was used to analyze MMP-2, MMP-9, and TIMP-2 expression in 24 primary FISS cases.
Keywords:
catsimmunohistochemistrymatrix metalloproteinasesmitotic countneoplasmpostvaccinal sarcomaskinvaccine-associated fibrosarcoma

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  • Cases were classified as recurrent (R) or non-recurrent (NR) based on clinical follow-up.
  • Tumor size, STS grading, depth, margins, Ki-67 index, and mitotic count were also assessed.

    • Main Results:

    • MMP-2, MMP-9, and TIMP-2 were expressed in FISS, indicating a role in invasiveness, but showed no significant difference between recurrent and non-recurrent groups.
    • STS grading, depth of infiltration, surgical margins, and Ki-67 index did not correlate with recurrence.
    • Tumor size (cutoff 3.75 cm, 86% accuracy) and mitotic count (cutoff 20/10 HPF, 80% accuracy) were significant prognostic markers for FISS recurrence.

    Conclusions:

    • Immunohistochemical expression of MMP-2, MMP-9, and TIMP-2 alone is not a reliable prognostic marker for FISS.
    • Tumor size and mitotic count are valuable prognostic indicators for predicting recurrence in FISS.
    • Further research may explore the complex roles of these enzymes in FISS progression.