Clear cell variant of calcifying epithelial odontogenic tumour (Pindborg tumour) of the mandible.

A calcifying epithelial odontogenic tumour (CEOT) is a rare benign odontogenic tumour of epithelial origin accounting for approximately 1% of all odontogenic tumours. The intraosseous form occurs more commonly in the posterior mandible whereas the extraosseous form is common in the anterior maxilla. CEOT is often asymptomatic and presents with a painless swelling of the mandible. Various histopathological variants of CEOT have been reported in the literature such as clear cell, Langerhans cell and CEOT with cementum-like areas with a 10-20% local recurrence. We report a case of a clear cell variant of CEOT in the left posterior mandible associated with an impacted third molar exhibiting its characteristic driven snow radiographic appearance. In addition, a few areas showed soap bubble multilocular presentation, change in trabeculae pattern and pathological fracture with the cupping type of root resorption in the mandibular second molar. Histopathologically, Liesegang rings were seen in the epithelium.