A 9-year-old male with a non-contributory medical history presented with left mandibular swelling. His mother had first noticed swelling in the area 2 months earlier, but stated that it seemed to resolve, only to develop again over the last 2 weeks. The boy had no complaints of pain, tenderness or altered sensation of his lower lip.Extraoral examination revealed mild facial asymmetry with enlargement of the body region of the left posterior mandible. The overlying skin lacked erythema or warmth and no anesthesia or paresthesia of the left lower lip was detected. Intraoral examination showed marked buccolingual expansion of the mandible centered on tooth #19 with vertical enlargement to the height of the occlusal plane; tooth #19 appeared ''engulfed.'' The mucosa was intact and of normal color (Fig.
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