Spontaneous regression of a large radiolucent lesion in the mandible.

This report presents a case of a large radiolucent lesion in the left posterior area of the mandible, causing displacement and resorption in the roots of a molar and enlargement of the body and ramus. Three years later, the lesion had undergone spontaneous regression without treatment. The radiological features and differential interpretation, as well as a discussion of the possible mechanism for the spontaneous regression are presented.