History of the present illness

This is a 25-year-old Caucasian female who presented with an expansile and well-demarcated radiolucency in the right posterior mandible (Figure 1). The panoramic radiograph demonstrates a well-defined unilocular radiolucency with a scalloped border below teeth #s 28-30. The lesion is focally eroding and pushing down on the inferior border of the mandible. The lesion is of unknown duration and the associated teeth are vital.

Figure 1 This panoramic radiograph was taken at first clinical presentation. Note the well-demarcated unilocular radiolucency with scalloped border involving area of teeth #s 28-30. Also note the thinning of the inferior border of the mandible with inferior expansion.