An unusually large osteochondroma of the mandibular angle: a case report

Abstract

BackgroundOsteochondroma is a benign bone tumor that can occur in both the mesenchymal and craniofacial bones. However, craniofacial osteochondromas are extremely rare, because the mandible develops by intramembranous ossification rather than by endochondral ossification.Case presentationThe most common site of craniofacial osteochondroma is the mandibular condyle, followed by the coronoid process. In the present study, we have described the case of a 64-year-old Japanese man with an unusually large osteochondroma located on the internal angle of the mandibular body. Clinical, radiological, pathological, and treatment-related aspects are discussed with respect to the tumor origins.ConclusionsIn the medical literature, there have been few reports of large osteochondromas of the mandibular angle with no clinical symptoms.

Osteochondroma Involving the Ramus of the Mandible: An Unusual Location

“…Osteochondromas are very rare in the maxillofacial region. In 1899, Jacob was the first to explain an OC of the coronoid process; for this reason, this condition has been named “Jacob's disease” [ 6 ]. In the craniofacial skeleton, it more commonly occurs around the temporomandibular joint because the region from the mandibular lingula to the anterior process of the malleus is derived from the part of Meckel's cartilage not replaced by mandibular bone, and those remnants of this embryonic tissue may persist in that region [ 7 ].…”

“…They have been reported in varied locations of the craniofacial region, where the most common sites are the coronoid process and the condyle [ 6 ]. It is a slow-growing, most-of-the-time asymptomatic tumor.…”

“…Chondrosarcoma is also characterized by low T1 signal after intravenous contrast infusion (gadolinium), something that is rarely recorded in a benign cartilaginous tumor. So MRI is the gold standard technique for detecting a malignant transformation [ 6 , 9 ].…”

“…The most frequently affected site was the mandibular condyle (88.3%), followed by the coronoid process (8.7%) [ 3 ]. Only 4 cases have been reported previously involving the mandibular symphysis region [ 4 , 5 ], and 5 cases were reported involving the mandibular angle region [ 6 ], and only 1 case has been reported involving the ramus of the mandible [ 7 ]. Herein, we report an extremely rare OC in the mandibular posterior ramus region.…”

Osteochondroma of the Mandibular Condyle: A Rare Case Presentation With Literature Review

“…An osteochondroma (OC), also referred to as osteocartilaginous exostosis, is a benign neoplasm within the skeletal system [ 1 , 2 ]. Typically manifesting in endochondral bones, this condition is often devoid of symptoms and presents as a protruding growth on the bone surfaces [ 3 ].…”