A laryngocele is an air-filled dilation of the saccule of the laryngeal ventricle. The laryngeal saccule, also known as the laryngeal appendix, is a vertical outpouching of the roof at the anterior margin of the laryngeal ventricle. The saccule, which is a vestigial structure thought to be analogous to lateral laryngeal air sacs in the great apes, has been postulated to augment vocalization. Other authors1 have suggested that the saccule provides lubricating mucus for the vocal cords. Although the length of most laryngeal saccules is less than 10 mm, larger saccules are common.1,2 Normal saccules usually do not extend above the superior border of the thyroid cartilages.3 Enlargement of the saccule may give rise to a saccular cyst or laryngocele. A saccular cyst occurs when the saccular orifice is occluded, causing mucus to accumulate. A laryngocele usually consists of an air-filled cavity and is distinguished by patent communication through the thyrohyoid membrane to the larynx (Figure 1 and Figure 2).
Quiz Case 2. Arch Otolaryngol Head Neck Surg. 2000;126(4):552-554. doi: