ISSN: 1899-0967
Polish Journal of Radiology
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vol. 84
Original paper

Magnetic resonance imaging features of craniofacial fibrous dysplasia

Damon Kim, Alexandra Heetfeld, Ingo G. Steffen, Kay Geert A. Hermann, Bernd Hamm, Thomas Elgeti

© Pol J Radiol 2018; 83: e16-e24
Online publish date: 2019/01/09
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To assess the value of magnetic resonance imaging (MRI) in detecting craniofacial fibrous dysplasia (CFD) and diagnosing and differentiating it from intraosseous meningioma. Additionally, the MRI appearance of the typical computed tomography (CT) imaging feature, the ground glass phenomenon, was evaluated.

Material and methods
MRI datasets of 32 patients with CFD were analysed retrospectively. Detectability in MRI was assessed by analysis of 10 randomly selected patients with CFD and 10 normal controls by two blinded readers. Changes of affected bone, internal lesion structure, T1 and T2 signal intensity, and contrast enhancement of the lesion in general and ground glass areas in particular were assessed. Ten patients with intraosseous meningioma (one in each) served as differential diagnosis for CFD.

All 10 CFD lesions were reliably detected in MRI. In 32 patients 36 CFD lesions were evaluated. In 66.7% CFD were iso- to hypointense in T1 and hyperintense in T2; this proportion was similar for ground glass areas (65.7%). Ground glass areas were more homogeneously structured than the whole CFD lesion in both T1 (100% vs. 56%, respectively) and T2 (91% vs. 61%, respectively). Contrast enhancement was found in 97% of complete CFD lesions and 93% of ground glass areas. The accuracy for CFD vs. intraosseous meningioma was 100% for ‘no soft-tissue component’ and 98% for ‘bone broadening’ in MRI.

Distinct morphological changes of CFD are reliably detected in MRI and allow differentiation from intra­osseous meningioma. Areas with ground glass phenomenon in CT show a predominantly homogenous internal structure in MRI with contrast enhancement.


magnetic resonance imaging, fibrous dysplasia of bone, craniofacial abnormalities

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