Imaging Sci Dent.  2011 Mar;41(1):23-28. 10.5624/isd.2011.41.1.23.

Computed tomographic features of fibrous dysplasia of maxillofacial region

• Sontakke S
• Karjodkar
• Umarji HR

• KMID: 1974396
• DOI: http://doi.org/10.5624/isd.2011.41.1.23

Abstract

PURPOSE
This study was to find the computed tomographic features of fibrous dysplasia of the maxillofacial region.
MATERIALS AND METHODS
All eight cases included in the study reported either to Government Dental College and Hospital or Nair Hospital Dental College, Mumbai between 2003 and 2009. The patients were prescribed computed tomogram in addition to conventional radiographs of maxillofacial region which were studied for characteristic features of fibrous dysplasia. The diagnosis of fibrous dysplasia was confirmed by histopathological report.
RESULTS
All cases showed the ill-defined margins of lesions except in the region where the lesions were extending to cortex of the involved bone. Internal structure of all cases showed ground glass appearance. Four cases of maxillary lesion showed the displacement of maxillary sinus maintaining the shape of maxillary sinus. Two cases showed complete obliteration of maxillary sinus. Displacement of inferior alveolar canal did not follow any typical pattern in any of the cases but was displaced in different directions.
CONCLUSION
The craniofacial type of fibrous dysplasia is as common as fibrous dysplasia of jaw. The margins, extent, internal structure and effect on surrounding structure are well detected on computed tomographic images.

Keyword

Fibrous Dysplasia of Bone; Tomography, X-Ray Computed; Jaw

MeSH Terms

Displacement (Psychology)
Fibrous Dysplasia of Bone
Glass
Humans
Jaw
Maxillary Sinus
Tomography, X-Ray Computed

Figure

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  Fig. 1 CT images of fibrous dysplasia. A. Coronal section shows craniofacial type of fibrous dysplasia with involvement 1. frontal, temporal, 2. zygomatic, 3. maxilla, and 4. mandible. B. Another coronal section shows maxillofacial type with involvement of 1. maxilla and 2. zygomatic bone.

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  Fig. 2 Axial CT image shows ill-defined margin (white arrow) except in region where lesion is extending to the cortex (black double arrow).

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  Fig. 3 Coronal CT image shows lesion involving maxilla with increased density of maxilla giving ground glass appearance (black arrow).

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  Fig. 4 Coronal CT image shows maxillary sinus occupied with lesion. Note: the size is reduced but the shape of maxillary sinus is maintained (black arrow).

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  Fig. 5 CT images. A. Coronal section shows obliteration of 1. maxillary sinus. B. Oblique section shows complete obliteration of 1. maxillary and 2. sphenoid sinus.

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  Fig. 6 CT images A. Oblique section shows displacement of inferior alveolar canal inferiorly (white arrow). B. Axial section showing displacement of inferior alveolar canal lingually (black arrow).

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