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The value of three-dimensional computed tomography in diagnosis and management of Jacob's disease

H Akan* and N Mehreliyeva

Ondokuz Mayis University, Faculty of Medicine, Department of Radiology, Samsun, Turkey


Figure 1
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  		Figure 1 Sagittal gradient-recalled echo (GRE) MR image of the right temporomandibular joint (TMJ) 9 months after arthroscopy (a) showing an obliteration of the medial compartment of the joint space (arrow) and a band-like area of low signal intensity on retrodiscal tissue (arrowhead). (b) Disk (arrow) is in normal position and configuration. C: condyle

 

Figure 2
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  		Figure 2 In three dimensional CT image, coronoid protrusion is seen above zygomatic arch. (a) Right side, (b) left side

 

Figure 3
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  		Figure 3 (a) Axial CT slice, and (b) 3D reformatted image show the extent of coronoid processes into temporal fossa and their pseudojoint with exostoses of zygomatic arches (arrows). Note the concavity of the articulating face of the coronoid (white arrow)

 

Figure 4
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  		Figure 4 Coronoidal measurements on 3D CT image. (a) Normal subject. (b) Patient with Jacob's disease. MP: mandibular plane, A: parallel line from incisura mandibulae to mandibular plane, BC: coronoid process length, ABC: coronoid process angle with mandibular plane, CZ: the part of the coronoid process above the zygomatic arch

 




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