KRT15 and odontogenic cyst: Bcl2 was generally interpreted as negative in these cysts, but the basal cell layer was stained either focally or diffusely in 16 cases, and these included 8 dentigerous cysts (K15, KR3, KR7, KR11, S3, S17, S21, S27), 1 botryoid odontogenic cyst (K9) 1 nasopalatine duct cyst (S38), 1 inflamed lateral periodontal cyst (K7), 4 residual/radicular cysts (K6, S20, S34, S37) and 1 odontogenic cyst NOS (S8) (Figure 4).