Imaging Sci Dent.  2013 Mar;43(1):49-53. 10.5624/isd.2013.43.1.49.

Recurrent simple bone cyst of the mandibular condyle: a case report

• Kim KA
• Koh KJ

• KMID: 2167447
• DOI: http://doi.org/10.5624/isd.2013.43.1.49

Abstract

Cysts of the mandibular condyle are rare and can be difficult to diagnose and treat. Clinically, a simple bone cyst is asymptomatic and often discovered incidentally on routine radiographic examination. This report shows an atypical simple bone cyst occurring in the mandibular condyle showing recurrence after surgical curettage. Radiologically, this lesion involving the mandibular condyle should be distinguished from other similar lesions such as a chondroma, a central giant cell granuloma, and an aneurysmal bone cyst. Radiographic assessment was useful for forecasting the prognosis of a simple bone cyst. Possible reasons for the recurrence were discussed radiographically.

Keyword

Bone Cysts; Mandibular Condyle; Radiography, Panoramic; Cone-Beam Computed Tomography

MeSH Terms

Aneurysm
Bone Cysts
Chondroma
Cone-Beam Computed Tomography
Curettage
Forecasting
Granuloma, Giant Cell
Mandibular Condyle
Prognosis
Radiography, Panoramic
Recurrence

Figure

• 

  Fig. 1 Panoramic radiograph shows well-defined multilocular radiolucency in the left mandibular condyle.

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  Fig. 2 Coronal (A), sagittal (B), and axial (C) CBCT images show an amorphous multilocular lytic lesion and a scalloped cortical border in some parts.

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  Fig. 3 Coronal (A) and axial (B) enhanced CT scans show a nonenhanced multilocular lesion in the left mandibular condyle.

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  Fig. 4 MRI shows homogeneous intermediate SI on the T1-weighted image (A) and homogeneous high SI on the T2-weighted image (B).

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  Fig. 5 The eviscerated and curetted mandibular condyle. A. Medial pole. B. Lateral pole.

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  Fig. 6 Microscopic examination shows a cyst without an epithelial lining, which is surrounded by dense fibrous connective tissue and reactive bone (H&E stain, ×100).

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