On routine panographic examination, a uniform round opacity measuring 1.5 cm in diameter was noted in the floor of the maxillary sinus of a 24-year-old man. All normal landmarks in the maxilla appeared intact. The patient had no symptoms and no history of sinus problems. This lesion most likely represents which of the following?

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A maxillary sinus retention cyst is a common, asymptomatic finding on radiographs, often discovered incidentally during routine examinations. It is characterized by a round or dome-shaped radiopacity in the sinus, not typically associated with symptoms or significant history, fitting the description provided.

On Routine Panographic Examination, a Uniform Round Opacity Measuring 1