Abstract
A 60-year-old woman underwent multislice whole-body computed tomography for staging of a high-risk melanoma of the anus. The examination revealed no metastases but did reveal a round, calcified structure in the mid-maxilla (Panel A, arrow). In the sagittal reconstruction, a peg-shaped supernumerary tooth was identified (Panel B, arrow), which resulted in the diagnosis of an unerupted, inverted mesiodens. A mesiodens is a developmental disturbance that occurs during odontogenesis; the overall prevalence is 0.2 to 1.9%. A mesiodens can cause median diastema (an open space between the incisors), a dentigerous cyst (a cyst associated with the crown of an unerupted or . . .
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