• Am J Otolaryngol · Jan 2011

    Case Reports

    Osteochondroma of the coronoid process (Jacob's disease): an unusual cause of restricted jaw motion.

    • Nicholas D'Ambrosio, Robert M Kellman, and Sasan Karimi.
    • Department of Radiology, Crouse Hospital, Syracuse, NY, USA. dambrosn@hotmail.com
    • Am J Otolaryngol. 2011 Jan 1; 32 (1): 52-4.

    AbstractOsteochondromas are the most common benign bone tumor, most commonly found in the ends of long bones; however, they rarely involve facial bones, particularly the mandible. Osteochondromas involving the coronoid process have rarely been reported in the literature but pose a diagnostic dilemma. When large enough, osteochondromas of the mandibular coronoid process can form a joint with the zygomatic arch (Jacob's disease). This pseudoarticulation results in restricted jaw motion, which can clinically be mistaken for temporomandibular joint dysfunction. We report a case of a 39-year-old man with chronic restricted jaw motion undiagnosed for several years.Copyright © 2011 Elsevier Inc. All rights reserved.

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