Gardner syndrome ---Upper GI examination shows a polypoid filling defect in the proximal...... duodenum. Radiograph of the right chest shows multiple sessile sclerotic osteomas. CT of the mandible shows multiple benign osteomas (arrows).
Odontogenic keratocyst in a 13-year-old boy. An abnormality was seen incidentally on conventional radiographs obtained for planning of orthodontic treatment. (a) Lateral oblique radiograph shows an ellipsoid, expansile, multilocular, corticated, lucent lesion occupying the anterior two-thirds of the left ramus with an impacted third molar crown displaced inferiorly within the lesion. The mandibular canal appears to be displaced inferiorly as well. (b) Posteroanterior radiograph shows buccal (lateral) displacement of the third molar by the lesion. The patient underwent en bloc resection. The differential diagnosis includes dentigerous cyst, odontogenic keratocyst, and ameloblastoma.