Compound odontoma in a dog.

A compound odontoma was diagnosed in the mandible of a 6-month-old dog. Histologically the tumor consisted primarily of mesenchymal tissue resembling dental pulp, odontoblasts, and areas of dentin. Smaller numbers of ameloblasts were associated with minimal enamel production. Odontomas are benign odontogenic tumors which must be differentiated from malignant bone tumors such as ameloblastic odontoma and ameloblastoma.