Case Report

A case involving the spontaneous reduction of an ameloblastic fibroma

Mekaru Yasuaki , Ueda Gousei, Higa Tsutomu, Kouchi Masato, Tatetsu Masaharu, Irei Mitsutaka

Mekaru Yasuaki
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Chubu Hospital, Okinawa, Japan. Email: panabia2008@live.jp

Ueda Gousei
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Chubu Hospital, Okinawa, Japan

Higa Tsutomu
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Nanbu Medical Center & Children's Medical Center, Okinawa, Japan

Kouchi Masato
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Nanbu Medical Center & Children's Medical Center, Okinawa, Japan

Tatetsu Masaharu
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Miyako Hospital, Okinawa, Japan

Irei Mitsutaka
Department of Dentistry, Oral and Maxillofacial Surgery, Okinawa Prefectural Chubu Hospital, Okinawa, Japan
Online First: December 01, 2017 | Cite this Article
Yasuaki, M., Gousei, U., Tsutomu, H., Masato, K., Masaharu, T., Mitsutaka, I. 2017. A case involving the spontaneous reduction of an ameloblastic fibroma. Journal of Dentomaxillofacial Science 2(3): 194-196. DOI:10.15562/jdmfs.v2i3.657


Objective: Ameloblastic fibroma is an uncommon type of mixed odontogenic tumor. It is caused by the growth of the odontogenic epithelium and mesenchymal tissue and can have adverse effects on the formation of dental structures. It usually arises in the mandible, but cases involving the mandibular ramus are rare.

Methods: Here, we report a case of ameloblastic fibroma in the right mandibular ramus involving a 15-year-old male patient. According to panoramic X-ray examinations, the tumor shrank spontaneously in the 3 years before surgery (from approximately 80mm×55mmto 50mm×25mm).

Results: A histological evaluation revealed the proliferation of odontogenic epithelial tissue and mesenchymal elements. The Ki-67 index of the lesion was 0%.

Conclusion: Cases of ameloblastic fibroma involving patients aged ≥ 22 years old are very likely to recur and undergo malignant changes.

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