Odontogenic myxoma (OM) is a relatively rare benign odontogenic tumor of mesenchymal origin. OM is more common in the mandible than in the maxilla. It is an asymptomatic lesion that shows an infiltrative growth pattern. When the maxillary sinus is involved, it often fills the entire antrum. Odontogenic tumors are uncommon in the maxillary molar area, which often leads to diagnostic dilemma as this region of the maxilla is in the vicinity of vital structures, and radiographic overlapping of structures is always present. We present a similar case of a 17-year-old male patient who reported with a swelling in the left maxilla that infiltrated the maxillary sinus in a short duration of time.
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