Dentigerous cyst associated with an ectopic third molar in the maxillary sinus: A case report and review of literature
A 22-year-old unmarried male reported to the dept. of Oral Medicine and Radiology, with the chief complaint of pus discharge from upper right posterior region of jaw and right nostril since last 3 years. Detailed history revealed that it started as pus discharge from oral cavity 3 years back, for which he took medicines from a general physician for over a year. But, no permanent relief was obtained, and condition further deteriorated when pus discharge from right nostril started 6 months back. Later on, he consulted a dentist for the problem who prescribed medicines for a week. As there was no relief, he referred him to our dental college.\nExtra-oral examination revealed presence of diffuse, soft, tender swelling over right maxillary sinus []. Intra-oral examination revealed absence of the upper right third molar. Pus discharge was evident from distal aspect of upper right second molar, on application of pressure with finger in buccal vestibule in that region. A provisional diagnosis of infected right maxillary sinus was considered.\nRadiographic evaluation included IOPA of the upper right second molar, OPG, Waters view, lateral cephalogram, and CT scan. OPG revealed upper right third molar in the maxillary sinus near its posterosuperior aspect []. On CT scan examination, a cystic expansile lesion was seen in the right maxillary sinus with the crown of an unerupted tooth within it. Bony defect was seen in its inferior wall allowing the cyst to communicate with the roof of the oral cavity. [].\nIncisional biopsy report was indicative of dentigerous cyst. Patient was referred to Maxillo-facial Surgery department where enucleation of cystic lesion under GA was carried out via the Caldwell-Luc approach, and tissue was sent for histopathological examination, which confirmed the finding of incisional biopsy report []. Post-operative healing was uneventful, and patient was followed-up over a period of next 2 years and was asymptomatic [Figures and ].