MCQ – 66182

Correct Answer � B Explanation

 Laryngocoele (Description: Congenital anomalous air sac communicating with cavity of larynx)

Neck Swelling

• Swelling appearing on Valsalva Maneuvre:
  • The source of the content can be blood vessel (phlebectesia or abnormality of the jugular veins-appears as bluish swelling) or can be air from the airway (external laryngocoele).
• A soft cystic mass at the lateral side of the neck, which does not change with Valsalva manoeuver, includes pharyngeal pouch/pharyngocoele, branchial cyst, cystic hygroma or solid tumour.
• Thyroglossal Cyst appears as a midline swelling which moves on protrusion of tongue and swallowing

LARYNGOCELE

• Air filled cystic swelling due to dilation of saccule of the ventricle.
• The saccule is a diverticulum of mucous membrane which starts from the anterior part of ventricular cavity and extends upwards between vestibular folds and lamina of thyroid cartilage. 

Types:

Laryngoceles can be classified into three types:

• Internal – A laryngocele is defined as internal if the dilatation lies within the limits of the thyroid cartilage.
• External – If the laryngocele extends beyond the thyroid cartilage and protrudes through the thyrohyoid membrane producing a lateral neck mass, it is considered external.
  • • External laryngocele presents as a reducible swelling in the neck which increases in size on coughing or performing valsalva
• Combined – In which both internal and external components are seen.

Causes

• Due to raised transglottic air pressure as in trumpet players, glass blowers or weight lifters.