Compared to the canine species, the mitotic count >7 on 10 HPFs of this neoplasm and high ki67 index were both suggestive for a poor prognosis, whereas in contrast perimembranous KIT expression may predict a more favourable outcome; thus, a larger number of cases and additional studies are needed to assess the biological behavior of mast cell tumor in meerkats. Here, MKI67 is linked to mast cell neoplasm.