Abstract
A case of maxillary desmoplastic ameloblastoma is described. The patient was a 48-year-old male who visited the hospital with a chief complaint of bulging left maxillary gingiva. Panoramic radiographs showed both radiopaque and radiolucent findings with unclear margins in the left upper jaw, and magnetic resonance imaging （MRI） revealed a clear non-signal area around the tumor on T1-weighted imaging. A biopsy was conducted and the patient was diagnosed with desmoplastic ameloblastoma. A partial maxillary resection was performed under general anesthesia. The resection limit was set based on the clinical findings, MRI findings, and peri-operative evaluations. Histopathologically, the tumor grew significantly in the regions of the lips and cheeks, advancing out of the bone under the epithelium of the gingival alveolar mucosa, but there was no tumor in the resection stump. The MRI findings were considered useful in setting the resection limits.
