Laryngoceles result from elongation and dilatation of the laryngeal saccules, and often form due to benign or malignant obstruction of the neck of the saccule.
Laryngoceles are divided into internal and external based on their course. An internal laryngocele extends superiorly along the paraglottic space and is confined by the thyrohyoid membrane. An external laryngocele extends through the thyrohyoid membrane into the soft tissues of the neck. Since an external laryngocele also has an internal component, some people call it a mixed laryngocele.
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