The patient reported progressive swelling of the anterior mandible (Figure 1) of four years' duration. Clinical examination revealed slight expansion of the anterior buccal and lingual vestibules. With the exception of tooth #24, all of the anterior teeth tested vital. A sectional CT showed some expansion of the anterior mandible with significant thinning of the cortices, especially on the lingual aspect where there were areas in which the cortex could not be visualized.
Figure 1 This radiograph was taken in first clinical presentation. Note the relatively well-demarcated and partially corticated radiolucency anterior mandible. It is in the vicinity of the endodontically treated tooth #24.