PON1 and neoplasm: Notably, there was also no association found between the other oxidative and lipid metabolism analytes evaluated in this study (BChE, d-ROMs, CUPRAC, oxy-adsorbent capacity) and tumor grading, metastasis, Ki67 index, and KIT pattern, likely indicating that they are of limited clinical importance as redox status indicators compared to PON-1 in dogs with MCTs.