Imaging Sci Dent.  2012 Mar;42(1):61-64. 10.5624/isd.2012.42.1.61.

Keratocystic odontogenic tumor: case report with CT and ultrasonography findings

• Sumer AP
• Sumer M
• Celenk P
• Danaci M
• Gunhan O

• KMID: 1974409
• DOI: http://doi.org/10.5624/isd.2012.42.1.61

Abstract

Keratocystic odontogenic tumor (KCOT) is a benign odontogenic tumor with a potentially aggressive and infiltrative behavior. KCOT is most commonly occurred in mandible and demonstrate a unilocular, round, oval, scalloped radiolucent area, while large lesions may appear multilocular. An important characteristic of KCOT is its propensity to grow in an antero-posterior direction within medullary cavity of bone causing minimal expansion. Definitive diagnosis relies on histological examination. In this report, a KCOT that had an expansion both buccal and lingual cortical bone is described including its features in computed tomography and ultrasonographic exams. The lesion was removed surgically via an intraoral approach under local anesthesia and histologically reported as a KCOT.

Keyword

Odontogenic Cysts; Computed Tomography, X-Ray; Ultrasonography

MeSH Terms

Anesthesia, Local
Mandible
Odontogenic Cysts
Odontogenic Tumors
Pectinidae
Tomography, X-Ray Computed

Figure

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  Fig. 1 Intraoral photograph shows buccal and lingual expansion.

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  Fig. 2 Panoramic radiograph shows a well-defined unilocular radiolucency in the left mandibular body region.

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  Fig. 3 Computerize tomography (CT) images. A. The axial CT scan (soft tissue window with contrast) shows a low density lesion that caused expansion and destruction buccally and lingually. B. The axial CT scan shows an ovoid well-defined scalloped border 28×18 mm in diameter cystic lesion. C. The coronal CT scan shows a hypodens lesion located in left mandibular corpus. D. The axial CT scan (bone window) shows the absence of buccal and lingual cortical outlines. There was no contrast enhancement in the lesion.

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  Fig. 4 Ultrasound image shows complex cyst with dens internal echoes with a posterior enhancement.

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  Fig. 5 Histopathologic examination shows a parakeratinized epithelium with a clear basal layer and a wavy appeared luminal surface. The cystic lumen contains keratin and the rete was flat (H&E stain, ×200).

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