Trismus is a common problem with various causes. Any abnormal conditions of relevant anatomic structures that disturb the free movement of the jaw might provoke trismus. Trismus has a detrimental effect on the quality of life. The outcome of this abnormality is critically dependent on timely diagnosis and treatment, and it is difficult to identify the true origin in some cases. We present a rare case of trismus due to fungal myositis in the pterygoid muscle, excluding any other possible pathogenesis.

中文翻译：

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源自翼状肌罕见真菌性肌炎的牙关紧闭：病例报告。

牙关紧闭是一个常见问题，原因多种多样。任何干扰下颌自由运动的相关解剖结构的异常情况都可能引起牙关紧闭。牙关紧闭对生活质量有不利影响。这种异常的结果严重依赖于及时的诊断和治疗，在某些情况下很难确定真正的起源。我们介绍了一个罕见的由翼状肌真菌性肌炎引起的牙关紧闭病例，排除任何其他可能的发病机制。