A 4-year-old mixed breed gelding presented for evaluation of a slow-growing mass on the pre-maxilla. After further examination a 2x2x4cm partially calcified, amorphous mass was found disrupting nearby incisor teeth. Surgical excision followed by submission of the tissues for histopathology revealed a rare odontogenic malformation known as a complex odontoma mixed with a severe inflammatory reaction. The prognosis was good in this case because of the rostral site of the tumor, ease of surgical excision, clean margins on histopathology, and ability of the horse to eat normally following surgery. Note: see Appendix 1 for an explanation of the Triadan System of tooth numbering used throughout this paper.