Diffusion-weighted imaging in the evaluation of odontogenic cysts and tumours.

The British Journal of Radiology
K SrinivasanOngkila Bhutia

Abstract

The differentiation between keratocystic odontogenic tumour (KCOT) and other cystic/predominantly cystic odontogenic tumours is difficult on conventional CT and MR sequences as there is overlap in the imaging characteristics of these lesions. The purpose of this study was to evaluate the role of diffusion-weighted imaging (DWI) and to assess the performance of apparent diffusion coefficients (ADCs) in the differential diagnosis of odontogenic cysts and tumours. 20 patients with odontogenic cysts and tumours of the maxillomandibular region were examined with DWI. Diffusion-weighted images were obtained with a single-shot echoplanar technique with b-values of 0, 500 and 1000 s mm(-2). An ADC map was obtained at each slice position. The cystic areas of ameloblastoma (n=10) showed free diffusion with a mean ADC value of 2.192±0.33×10(-3) mm(2) s(-1), whereas the solid areas showed restricted diffusion with a mean ADC value of 1.041±0.41×10(-3) mm(2) s(-1). KCOT (n=5) showed restricted diffusion with a mean ADC value of 1.019±0.07×10(-3) mm(2) s(-1). There was a significant difference between the ADC values of KCOT and cystic ameloblastoma (p<0.01, Mann-Whitney U-test). The cut-off with which KCOT and predominantly cystic ameloblast...Continue Reading

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Citations

Jul 15, 2015·Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology·Satu ApajalahtiJaana Hagström
Jan 3, 2015·The British Journal of Oral & Maxillofacial Surgery·F A ProbstU G Müller-Lisse
May 18, 2016·Journal of Magnetic Resonance Imaging : JMRI·Junichiro SakamotoTohru Kurabayashi
Jul 4, 2016·Clinical Radiology·D MacDonald
Nov 1, 2016·Case Reports in Dentistry·Antonione Santos Bezerra PintoSérgio Lúcio Pereira de Castro Lopes
Jan 23, 2018·Korean Journal of Radiology : Official Journal of the Korean Radiological Society·Yifeng HanZhenfeng Wang
Jul 30, 2019·Journal of Computer Assisted Tomography·Ahmed Abdel Khalek Abdel Razek
Aug 2, 2018·Insights Into Imaging·Andrea BorghesiLorenzo Preda
Oct 18, 2020·Odontology·Tohru KurabayashiShin Nakamura
Jun 17, 2021·Dento Maxillo Facial Radiology·Natnicha WamasingTohru Kurabayashi

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