A large mass was found in the incisor region of the mandible in an 8-hour-old female calf. It had papillary projections and infiltrating anastomosing cords and islands of oral epithelium with a peripheral row of columnar cells. There was excessive keratinization on the surface as well as in the center of cords. Histologically it resembled epidermoid carcinoma and epulis. This is probably the second report of a congenital ameloblastoma.
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