Diffusion-weighted MR imaging of ameloblastomas and keratocystic odontogenic tumors: differentiation by apparent diffusion coefficients of cystic lesions.

AJNR. American Journal of Neuroradiology
M SumiT Nakamura

Abstract

Ameloblastomas and keratocystic odontogenic tumors are major aggressive odontogenic tumors in the maxillomandibular regions, but the differentiation between these 2 tumors is frequently ineffective based on only conventional CT and MR imaging findings. Here, we evaluated diffusion-weighted MR imaging for the differentiation of these 2 odontogenic tumors. We prospectively studied 9 patients with ameloblastoma and 7 patients with keratocystic odontogenic tumor using diffusion-weighted MR imaging. Apparent diffusion coefficients (ADCs) of the nonenhancing and solid lesions in these tumors were determined with use of 2 b factors (500 and 1000). Two types of nonenhancing lesions were identified; one with high signal intensity on fat-suppressed T2-weighted images (type A) and the other with low or intermediate intensity (type B). The type A nonenhancing lesions were observed in all the ameloblastomas, but they were evident in only 2 keratocystic odontogenic tumors. It is interesting to note that the ADCs of the nonenhancing lesions in the ameloblastomas were significantly higher than those of the nonenhancing lesions in the keratocystic odontogenic tumors (2.48 +/- 0.20 x 10(-3) mm(2)/s vs 1.13 +/- 0.56 x 10(-3) mm(2)/s; P < .001). T...Continue Reading

References

Aug 1, 1992·Radiology·M MinamiY Sasaki
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Citations

Mar 8, 2013·Dento Maxillo Facial Radiology·M FujitaJ-I Asaumi
May 4, 2012·The British Journal of Radiology·K SrinivasanO Bhutia
May 3, 2012·Neuroimaging Clinics of North America·Wessam Bou-AssalySuresh K Mukherji
Apr 20, 2010·Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontics·Pingzhong WangWenjing Zhu
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Jan 23, 2018·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Yifeng HanZhenfeng Wang
Feb 8, 2020·Oral Radiology·Jira KitisubkanchanaChanchai Wongchuensoontorn
Sep 12, 2020·AJNR. American Journal of Neuroradiology·R M LoureiroM M Daniel
Aug 2, 2018·Insights Into Imaging·Andrea BorghesiLorenzo Preda
Oct 10, 2020·Seminars in Musculoskeletal Radiology·Abdellatif BaliAnja Bernaerts
Feb 7, 2021·International Journal of Computer Assisted Radiology and Surgery·Zijia LiuJing Han
Jul 31, 2021·International Journal of Paleopathology·Claudina V GonzálezSofia N Wasterlain

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