Table 1.

Coded labels provided to various histopathological features in the present systematic review

Ameloblastoma component
AM-F	Follicles of odontogenic epithelium with peripheral tall columnar ameloblast-like cells with reversal of polarity and central stellate reticulum-like cells in the form of follicles within a mature connective tissue stroma
AM-P	Odontogenic epithelium infiltrating into a mature connective tissue stroma in the form of interlacing strands or plexuses
UAM	Cystic lesion having lumen lined by tall columnar cells with hyperchromatic nuclei exhibiting nuclear palisading with reversal of polarity and cytoplasmic vacuolisation (Gorlin-Vickers Criteria)14
Adenomatoid odontogenic tumour component
AOT-S	Sheets/islands/cords/whorling of spindle to ovoid shaped odontogenic epithelial cells
AOT-D	Duct-like structures lined by epithelial cells with eosinophilic material/cystic space in the lumen
AOT-R	Rosette-like structures consisting of two layers of low to tall columnar epithelial cells with eosinophilic material/cystic space centrally in the lumen
Dentinoid material
DM	Extracellular homogenous eosinophilic material (dentinoid)
Other features
CC	Presence of clear cells within the tumor islands in AOT component of the lesion.
GC	Presence of ghost cells within odontogenic epithelial nests/islands in the AOT component or within ameloblastomatous epithelium

AM = ameloblastoma; UAM = unicystic ameloblastoma; AOT = adenomatoid odontogenic tumour; DM = dentinoid material; CC = clear cells; GC = ghost cells.