Diverse calcification patterns of ameloblastic fibro-odontoma on radiographic examination

Araki, Masao; Namaki, Shunsuke; Amemiya, Toshihiko; Matsumoto, K; Honda, Kazumasa; Yonehara, Yoshiyuki; Matsumoto, Naoyuki; Asano, Masaharu

doi:10.2334/josnusd.16-0194

Cited by 4 publications

(3 citation statements)

References 29 publications

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“…Although radiopaque components of an AFO are generally located at the center of the lesion [8][9][10][11][12][13], radio-opacity was found on the medial side in the present case. Although AFOs demonstrate varying calcification patterns that are blended and full or inhomogeneous, including complex odontoma-like calcifications, and have been shown to be associated with impacted teeth on CT images [15], multiple calcified bodies were few in the present case. Previously, Uchiyama et al reported that the CT value of a calcified body is useful for diagnosis of AFO [14].…”

Section: Discussionmentioning

confidence: 50%

“…The internal contents have some degree of radiopacity depending on the extent of mineralization that has occurred within the lesion [6,7]. Most previous reports of AFO have described findings on conventional radiographic images [8][9][10][11][12][13][14][15] and reports detailing the appearances on computed tomography (CT) and magnetic resonance (MR) radiological images are limited.…”

Section: Introductionmentioning

confidence: 99%

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MR appearance of a rare ameloblastic fibroma with formation of dental hard tissues with histopathologic correlation: a case report

et al. 2022

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An ameloblastic fibroma with formation of dental hard tissues, which the classical name is ameloblastic fibro-odontoma (AFO), is a rare type of mixed odontogenic tumor. An 8-year-old boy was diagnosed with AFO, with an inhomogeneous high signal within the lesion shown by T2-weighted magnetic resonance imaging (MRI). Computed tomography (CT) imaging revealed a unilocular low CT value area of 24 x 19 x 26 mm with buccolingual bony expansion and cortical bone thinning on the left side of the mandible including the crown of the mandibular left second molar. In addition, multiple calcified bodies were detected within the lesion, one of which had a CT value of approximately 2200 HU, equivalent to that of enamel. MRI indicated the lesion to be sized 24 × 19 × 25 mm along with buccolingual bony expansion in the left side of the mandible. Additionally, the lesion showed an internal inhomogeneous high signal, while a portion had an especially high signal in T2-weighted images. That particularly high signal area coincided with the nodular growth area of mucus-rich mesenchymal components without the epithelial component in histopathology findings. The particularly high signal revealed by T2-weighted imaging could be attributed to the mucus-rich component. MRI was found useful for revealing differences in the internal histopathological properties of an AFO in our patient.

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Section: Discussionmentioning

confidence: 50%

Section: Introductionmentioning

confidence: 99%

MR appearance of a rare ameloblastic fibroma with formation of dental hard tissues with histopathologic correlation: a case report

et al. 2022

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“…Araki et al . [ 9 ] studied the diverse calcification patterns seen in radiographs of patients with AFO. He categorized the calcification patterns based on their appearance and their location within the radiolucency.…”

Section: Discussionmentioning

confidence: 99%

Ameloblastic fibro-odontoma with a predominant radiopaque component

Kale

Shetty

Balakrishnan

et al. 2017

Ann Maxillofac Surg

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Ameloblastic fibro-odontoma (AFO) is a rare odontogenic tumor. Initially believed to be a lesion similar to ameloblastic fibroma (AF), it is now considered as a separate entity in the WHO odontogenic tumor classification. Commonly associated with a painless swelling and an associated absence of eruption of a tooth, AFO presents as a mixed radiopaque and radiolucent lesion in the younger population with a predilection for the posterior region. Histologically, it shows the characteristics of an immature complex odontoma with irregularly arranged enamel, dentinoid, cementoid-like structures, and ectomesenchymal tissue. The following case report describes a case of AFO with a predominantly radiopaque component and briefly discusses the available literature pertaining to this rare entity.

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