A cystic structure was identified radiographically in a four year old dog during routine dental prophylaxis. Surgical removal of the cyst lining was achieved by exposure of the site through extraction of the right first to third maxillary incisor teeth (101, 102, 103). The cyst lining was removed en-bloc. The cavity was curetted and filled with decalcified freeze-dried bone. Histological examination revealed a radicular cyst. The proposed etiology is blunt trauma to tooth 103, pulpal necrosis, apical granuloma and resulting cyst formation. Fourteen months following surgery, there was no recurrence of the cyst.
