No abstract available.
Cicatrix* ; Vocal Cords*

No abstract available.
Electric Stimulation* ; Vocal Cords*

Glottic hemangioma is a benign vascular tumor that is rarely seen in the adult population. We report a rare Filipino case of glottic hemangioma in a 65-year-old female presenting with 2 weeks history of hoarseness and a smooth, pedunculated, bluish mass at the anterior one-third of the right vocal cord in flexible laryngoscopy. Direct suspension laryngoscopy showed a pedunculated mass that was paler-looking, similar to the color of the surrounding mucosa, exhibiting the Phonation sign of Menzel. The patient underwent microlaryngeal excision and histopathology showed findings consistent with cavernous hemangioma.
Vocal Cords ; Hemangioma ; Adult

Humans ; Microscopy ; Vocal Cords

No abstract available.
Acoustics* ; Vocal Cord Paralysis* ; Vocal Cords*

No abstract available.
Granuloma* ; Humans ; Ventilation* ; Vocal Cords*

No abstract available.
Anesthesia, General* ; Ulcer* ; Vocal Cords*

A computational study of the pulsating jet in a squared channel with a dynamic glottal-shaped constriction is presented. It follows the model experiments of Triep and Brücker (J Acoust Soc Am 127(2):1537–1547, 2010) with the cam-driven model that replicates the dynamic glottal motion in the process of human phonation. The boundary conditions are mapped from the model experiment onto the computational model and the three dimensional time resolved velocity and pressure fields are numerically calculated. This study aims to provide more details of flow separation and pressure distribution in the glottal gap and in the supraglottal flow field. Within the glottal gap a ‘vena contracta’ effect is generated in the mid-sagittal plane. The flow separation in the mid-coronal plane is therefore delayed to larger diffuser angles which leads to an ‘axisswitching’ effect from mid-sagittal to mid-coronal plane. The location of flow separation in mid-sagittal cross section moves up- and downwards along the vocal folds surface in streamwise direction. The generated jet shear layer forms a chain of coherent vortex structures within each glottal cycle. These vortices cause characteristic velocity and pressure fluctuations in the supraglottal region, that are in the range of 10–30 times of the fundamental frequency.
Constriction* ; Humans ; Phonation ; Vocal Cords

Schwannoma of the larynx are rare benign tumor. Most laryngeal schwannomas were seen at the aryepiglottic fold or the false vocal cords. But there were extremely rare reports about schwannoma of the epiglottis. We report an unusual case of epiglottic schwannoma with the literature.
Epiglottis ; Larynx ; Neurilemmoma ; Vocal Cords

Sulcus vocalis refers to a condition in which a furrow occurs along the upper medial edge of the vocal folds. The etiology of sulcus is controversial. Bouchayer et al. proposed that sulcus vocalis is congenital and there are what appeared to be transition forms between the cyst and sulcus. Sulcus vocalis is frequently associated with epidermoid cyst. Epidermoid cyst may rupture spontaneously. If the resulting opening is as large as the cyst, the resulting empty pocket becomes a glottic sulcus. In addition, mucosal invagination may proceed on the upper and lower margins of the cyst and then sulcus vocalis can be formed. We experienced 3 cases of epidermoid cyst associated with sulcus vocalis on the upper and lower margins of the cyst and thought that presenting them would be helpful to understand the pathogenesis of the sulcus vocalis from the epidermoid cyst.
Epidermal Cyst* ; Rupture ; Vocal Cords