Paraganglioma of the larynx: a case report.

Background: Paragangliomas arise from paraganglion cells as part of the diffuse neuroendocrine system. These tumors are generally considered benign. They appear rarely in the larynx and most of them are supraglottic.

Maturation of the auditory system: 2. Transient otoacoustic emission suppression as an index of the medial olivocochlear bundle maturation.

Contralateral suppression of transient otoacoustic emissions in 42 premature babies (84 ears; post-conceptional age [PCA] 30-36 weeks) was compared to that of 39 full-term babies (78 ears; PCA: 37-45 weeks). Eighteen healthy adults and ten young children (5-14 years old) were studied as controls. Risk factors for hearing loss were registered in both preterm and full-term groups.