Immunohistochemical analysis of smooth muscle actin and CD31 in feline post-injection site fibrosarcomas: association with tumour grade, vascular density, and multinucleated giant cells.

Correlations between tumour grade, MGCs count, vascular density and mitotic index were examined using Spearman’s rank correlation (r: Spearman’s rank correlation coefficient); p ≤ 0.05 was considered statistically significant, and p ≤ 0.001 as highly significant.

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