Desmoplastic ameloblastoma (DA) is a rare pathological variant of ameloblastoma that presents characteristic radiographic findings. Herein, we report three DA cases: one occurred in the anterior portion of the maxilla, and two in the anterior portion of the mandible.
[Case 1] The patient was a 61-year-old man who presented to the hospital with a primary complaint of swelling in the right incisor region of the maxilla. Panoramic radiography revealed a mixed radiolucent/radiopaque area with a partly ill-defined border. Computed tomography (CT) revealed expansion of the labial cortical bone. Root resorption was not observed. On magnetic resonance imaging, the lesion exhibited intermediate- to low-signal intensity on T1-weighted imaging, and heterogeneous high- to low-signal intensity on T2-weighted imaging.
[Case 2] The patient was a 49-year-old woman who presented to the hospital with a primary complaint of swelling in the right premolar region of the mandible. Panoramic radiography revealed a mixed radiolucent/radiopaque area with a partly ill-defined border and root displacement of the first and second premolars without root resorption. CT revealed a small high-density structure in the lesion.
[Case 3] The patient was a 51-year-old woman who presented to the hospital with a primary complaint of swelling in the left incisor region of the mandible. Panoramic radiography revealed a honeycomb-like radiolucent area and slight root displacement of the canine and first premolar. CT revealed a small high-density structure in the lesion.
Biopsies were performed in all patients, and they were diagnosed with DA. Herein, we report their imaging findings and review previously reported cases of DA in Japan. DA is reported to have higher recurrence rates compared to typical ameloblastomas; therefore, imaging findings are important for determining treatment strategies.
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