Journal of Oral Science
Online ISSN : 1880-4926
Print ISSN : 1343-4934
ISSN-L : 1343-4934
Case Report
Osteochondroma of the coronoid process of the mandible
Kunihiko SawadaDirk SchulzeKunihito MatsumotoShigenori HiraiKoji HashimotoKazuya Honda
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2015 Volume 57 Issue 4 Pages 389-392

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Abstract

We describe a rare case of osteochondroma of the coronoid process of mandible accompanied by severe trismus in a 14-year-old Japanese boy. The patient had initially been diagnosed as having internal derangement of the temporomandibular joint (TMJ), and conservative treatment had failed to improve the symptoms. Despite extremely limited TMJ movement, panoramic radiography revealed no abnormality, but magnetic resonance imaging suggested internal derangement of the left TMJ. Five months later, the trismus worsened and computed tomography revealed a bone-like mass confluent with the coronoid process, which was finally diagnosed as osteochondroma. The patient then underwent intra-oral coronoidectomy. (J Oral Sci 57, 389-392, 2015)

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© 2015 by Nihon University School of Dentistry
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