Treatment

The procedure was performed under general anesthesia. The tumor was removed through segmental resection of the body of the mandible including the inferior border of the mandible. The surgical specimen was radiographed intraoperatively to reveal the bony margins, which were clear both anteriorly and posteriorly. The surgical site was thoroughly irrigated with bacitracin irrigation and hemostasis was accomplished. A prefabricated 2.7 KLS Martin reconstruction plate was adapted to the right ascending ramus and anterior mandible (Figure 4). The area healed within 4-6 weeks and the overlying mucosa looked pink and healthy. In addition, the patientís remaining dentition was extracted.

Incisional and excisional biopsy

Histologic examination revealed a solid and benign neoplasm of odontogenic epithelial origin made up of combined epithelial islands and epithelial cords. The islands and cords are surrounded by cellular fibrous connective tissue and are lined by columnar or cuboidal and palisaded epithelial cells (Figure 5). The center of some of the epithelial islands is filled with cuboidal and stellate epithelial cells in most parts and keratin including keratin pearls (Figure 6) in focal areas.

 

Figure 4 This is a panoramic radiograph represents the post-operative changes consistent with resection of the tumor and replacement with a metal plate adapted to the right ascending ramus and the symphyseal-perisymphyseal region.

Figure 5 Low power (x100) histology illustrates a benign neoplasm of odontogenic epithelial origin made up of islands and cords of epithelial cells suspended on mature connective tissue. The epithelial islands are lined by one layer of palisaded and polarized columnar cells with areas of reverse polarization. The center of the islands is filled with stellate epithelial cells and keratin, including a few keratin peals.

Figure 6 Higher power (x200) histology illustrates a closed look of the epithelial islands with palisaded and columnar periphery and center filled with stellate epithelial cells and keratin.