Currently, there are few studies investigating the molecular expression of KITLG and c-KIT in veterinary medicine, mostly in canine mast cell tumors [38,39,40,41,42] and gastrointestinal stromal tumors [42,43,44], with no descriptions of specific immunolabeling in canine SCC or DSCC. Here, KITLG is linked to gastrointestinal stromal tumor.