Abstract
Background The association of a dentigerous cyst with a maxillary sinus ectopic tooth is a rare situation. The objective is to study different aspects of this pathology.
Observation: This was a 22-year-old man who presented symptoms of recurrent right unilateral maxillary sinusitis complicated by fistulization the oral cavity. Facial CT showed an impacted tooth 18 in the inner wall of the right maxillary sinus at the level of ostium, and total filling of the right maxillary sinus. In MRI of the facial area the signal was not in favor of a tumor process. The patient underwent enucleation of the entire sinus formation with tooth extraction. The pathological examination concluded that it was a dentigerous cyst on an ectopic 3rd molar in the maxillary sinus. Conclusion The dentigerous cyst on an ostio-meatal dental ectopy is an interesting entity to know due to its rarity and the risk of diagnostic delay especially that malignant transformation is possible.
Key-words: Ectopic tooth eruption- dentigerous cyst- tooth extraction- pathology
