Abstract
Bilateral hyperplasia of the coronoid processes of the mandible is an uncommon condition that has been reported in 24 patients. 1–3 The coronoid processes are usually normally shaped, 4,5 and have been classically described by Shira and Lister as “mere overgrowths of bone.” 6 The process has been diagnosed as a developmental hyperplasia, and the etiology has remained unknown. 1,2,5,7 The most common symptom of bilateral coronoid hyperplasia is limitation of mandibular opening without visible facial deformity. 1–3,5,8 The previously reported cases of bilateral coronoid hyperplasia have all been reported in males. 1–3 This has led some authors to speculate that the condition is sex-linked. This paper describes two new cases, one being the first reported in a female.
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