eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2026-09-29 14 9 79 82 10.12691/ajmcr-14-9-1 AJMCR20261491 article Noriko Matsuzawa 1 Hideki Mori 2 Yoshihiro Kimura 3 Mitsuhiro Aoki Mitsuhiro.aoki@tokushukai.jp 4 Department of Dental Medicine, Kyoto Prefectural University of Medicine Graduate School of Medical Science, 465, Kaji-cho, Hirokoji-Kawaramachi, Kyoto City, Kyoto, Japan Department of Diagnostic Pathology, Ogaki Tokushukai Hospital, 6-85 Hayashi-Machi, Ogaki City, Gifu, Japan Department of Dental and Oral Surgery, Ogaki Tokushukai Hospital, 6-85 Hayashi-Machi, Ogaki City, Gifu, Japan Department of Otolaryngology, Ogaki Toshukai Hospital, 6-85 Hayashi-Machi, Ogaki City Japan Ameloblastoma (AM) is a benign but locally infiltrative epithelial odontogenic neoplasm. An 86-year-old woman presented with swelling on the left palate gum. CT images as well as panoramic X-ray photograph displayed a multiocular radiolucent lesion extending from the alveolar process to the plate. Pathological diagnosis of the resected tumor tissue was AM arisen from the anterior maxillary bone. AM can present with a follicular, plexiform, acanthomatous, basal cell, granular or desmoplastic subtype. Present case was diagnosed as a mixed pattern of acanthomatous subtype and basal cell subtype. In this study, tumor cells of the basal cell type had a clear continuity to the islands of acanthomatous subtype suggesting that the cells of basal type could differentiate to those of acanthomatous islands. To the best of our knowledge, presence of the unique combination of acanthomatous subtype and basal cell subtype, and the mutual correlation with two subtypes of AM have not yet been described. https://pubs.sciepub.com/ajmcr/14/9/1/ajmcr-14-9-1.pdf Ameloblastoma Maxillary Acanthomatous Basal Cell Mixed pattern