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Simple bone cyst versus odontogenic keratocyst: differential diagnosis by digitized panoramic radiography
O Ferreira Júnior1, J H Damante, J R P Lauris
1Department of Stomatology, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil. osnyfjr@fob.usp.br
Objectives:
To identify the contour and pixel grey levels of simple bone cyst (SBC) and odontogenic keratocyst (OKC) images that might contribute to differentiating between the two lesions.
Methods:
Panoramic radiographs of 32 SBC and 20 OKC were digitized and analysed by six examiners. The contours of the images were classified as indistinct, distinct without a sclerotic border, and distinct with a sclerotic border. The presence or absence of scalloping and the pixel grey levels of the radiolucent part of the images were also determined.
Results:
The sclerotic border was more frequent in the OKC, especially in the posterior segment (P = 0.0301). The presence of scalloping was more frequent in the superior segment of the SBC (P = 0.0295). The pixel values were higher in the OKC than in the SBC images (P = 0.00134).
Conclusions:
Details about the contour and pixel grey levels of OKC and SBC assist in the diagnosis of these lesions.
