The obtained results revealed that cats with luminal B or triple-negative mammary carcinoma showed a higher leptin IHC score in the tumor glandular cells, comparing to the healthy control samples (1.93 vs. 1.34, p < 0.05; 2.00 vs. 1.34, p < 0.05, respectively; Figures 6A, 7A,B). The gene discussed is LEP; the disease is neoplasm.