2019 Volume 65 Issue 5 Pages 339-344
We present a case of extraosseous/peripheral type (PA) ameloblastoma. Histopathologically, the tumor was granular cell type. The patient was a 66-year-old man who presented with a 20 × 12 × 6 mm tumor on the gingiva of the lower left molar region. Alveolar bone absorption by the tumor was found on computed tomographic imaging. A biopsy was performed, and the histological diagnosis was granular cell type ameloblastoma. Based on the diagnosis of PA, the tumor was excised with peripheral osteotomy, performed with the patient under general anesthesia. Histopathologically, the tumor was continuous with the surface epithelium, and there were large round cells with acidophilic granular cytoplasm. No evidence of recurrence was found during 24 months of observation after surgery.
