[A case of a calcifying odontogenic cyst associated with odontoma inducing impaction of a deciduous tooth].

A 4-year-old boy was examined with a chief complaint of "Delayed eruption of maxillary right deciduous central incisor". Oral examination revealed a firm swelling on the labial gingiva at the right deciduous incisor of maxilla. Radiographic examination revealed that odontoma-like substances disturbed the eruption of the central deciduous maxillary incisor. The odontoma-like substances were removed surgically and examined histopathologically. The thin sections showed findings typical of a Calcifying Odontogenic Cyst with Odontoma.