J Korean Assoc Oral Maxillofac Surg.  2010 Jun;36(3):214-216. 10.5125/jkaoms.2010.36.3.214.

Osteochondroma of the mandibular inferior border: an atypical case

• Kil TJ
• Kim JY
• Kim S
• Kim HJ
• Nam W

• KMID: 2189951
• DOI: http://doi.org/10.5125/jkaoms.2010.36.3.214

Abstract

An osteochondroma is an osseous protuberance with cartilaginous growth potential, usually arising in skeletal bone and relatively uncommon in the craniofacial bone. Osteochondroma of the craniofacial region usually occurs at the condyle or the tip of the coronoid process, and rarely arises in the mandibular body, symphysis, ramus, and similar areas. Excision of the lesion including the periosteum is curative, and recurrence or malignant change (usually to a chondrosarcoma) after treatment is rare. We present an atypical case of osteochondroma in the left mandibular inferior border with review of literature.

Keyword

Osteochondroma; Mandible; Inferior border

MeSH Terms

Mandible
Osteochondroma
Periosteum
Recurrence

Figure

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  Fig. 1. Osseous protuberance on the left mandibular inferior border.(arrow)

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  Fig. 2. A. Radiographic examination revealed a radiopaque bony mass from the mandibular inferior border.(arrow) There was neither surface erosion nor intralesional discrepancy in density. B. Panoramic view taken immediately after surgery.(arrow) C. Panoramic view 6 months after excision. The continuity of the mandibular inferior border was recovered by bony remodeling. There was no recurrence.(arrow)

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  Fig. 3. The excised tumor was 10 mm in length and 13 mm in width, with a whitish smooth surface.

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  Fig. 4. Microscopic appearance illustrating a bony structure covered with a cartilaginous cap. The cartilage is covered by fibrovascular connective tissue. Below that, the cartilage is being replaced by mature lamellar bone.(endochondral bone formation) (H&E staining, original magnification ×10)

Reference

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