BCL2 and dental pulp disorder: In fact, bcl2 positivity was never as strong and diffuse in other cyst types, but there were some cysts that clearly exhibited continuous basal layer bcl2 labelling of weak to moderate intensity; these were predominantly developmental cysts, mostly dentigerous cysts (8/16 non-OKCs with basal bcl2 labelling), but radicular cysts (especially mature ones with atrophic epithelium) were also identified as having this staining pattern.