Abstract
The present report describes the morphological features of a spontaneous, bilateral, complex odontoma of the incisor teeth in an 87-week-old male Swiss mouse (Crl: CD-1(ICR)BR). This report constitutes the second report of an odontogenic tumour in a Swiss mouse and the first describing a bilateral complex odontoma in this strain of mouse. The report emphasizes the importance of thoroughly examining the oral cavity for dental tumours.