J Korean Assoc Oral Maxillofac Surg.  2012 Aug;38(4):249-254. 10.5125/jkaoms.2012.38.4.249.

Severe trismus due to bilateral coronoid process hyperplasia in growth hormone therapy patient: a case report

Affiliations
  • 1Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Yangsan, Korea. inkchung@pusan.ac.kr

Abstract

Bilateral coronoid process hyperplasia is a rare condition characterized by an enlarged mandibular coronoid process. The painless progressive reduction of a mouth opening is caused by coronoid process impingement on the posterior aspect of the zygomatic bone. Hyperplasia of the bilateral coronoid process leads to the restriction of a mandibular opening consequent to the impingement of the enlarged coronoid process on the temporal surface of the zygomatic bone or with the medial surface of the zygomatic arch. The process has been diagnosed as developmental hyperplasia. Otherwise, the development of the coronoid process may be associated with growth hormone. This paper describes a case of trismus caused by coronoid hyperplasia in an idiopathic short-stature patient who received growth hormone therapy by somatropin injections.

Keyword

Coronoid process hyperplasia; Trismus

MeSH Terms

Growth Hormone
Human Growth Hormone
Humans
Hyperplasia
Mouth
Trismus
Zygoma
Growth Hormone
Human Growth Hormone
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