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Clinical Problem Solving: Radiology
June 01, 2008

Radiology Quiz Case: Diagnosis

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Copyright 2008 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.2008

Arch Otolaryngol Head Neck Surg. 2008;134(6):668. doi:10.1001/archotol.134.6.668

Diagnosis: Complex odontoma of the maxillary sinus

Odontomas are the most prevalent odontogenic tumors.1Despite their name, they are considered hamartomas rather than true neoplasms. They are classified as either compound or complex based on their organization. Compound odontomas consist of toothlike structures made from dentin and enamel. Alternatively, if a more disorganized mass is present, the term complex odontomais used. Complex odontomas are twice as prevalent as compound odontomas and tend to affect the maxilla more often than the mandible.2Rarely, they have been reported to involve the maxillary sinuses.1,38Odontomas may present with pain, pressure, and swelling. They may be associated with interrupted tooth eruption or found incidentally. However, lesions involving the maxillary sinuses may also present with an oroantral fistula and sinusitis.7,8

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