Issue N# 5 - 2001
Histology of the larynx.
Authors : H. Kooli, A. Zhioua, S. Zekri, D. Najeh, M. H. Jaafoura, M. Ferjaoui (Tunis)
Ref. : Rev Laryngol Otol Rhinol. 2001;122,5:291-294.
Article published in french
Downloadable PDF document french
The mucous membrane lining the interior of the larynx was studied in autopsy specimens taken from 21 infant larynxes, with ages ranging from 1 to 15 years. Only those larynxes in which the epithelial mucosal structures were preserved were set aside for study. A standard histological technique was applied. Paraffin sections were stained with haematoxylin-eosin, PAS, Masson's triple stain and orcine. The epithelium of the ventricles, ventricular bands and subglottis was found to be of respiratory type. On the vocal folds, the lining was non-keratinising squamous epithelium. These findings are consistent with those found in the literature. Findings that differed were as follows: the laryngeal surface of the epiglottis is classically described as having a respiratory type of epithelium, whereas we found it to be of non-keratinising stratified squamous type. The literature describes the epithelium of the ventricular bands as respiratory. While in our series we found stratified squamous in 56 % and respiratory in 44 %. Other findings are imprecise in the literature, and need definition; the finding of taste papillae in six cases without age correlation; and the richness of follicles in the lymphoid tissue at the epiglottis and ventricles of children aged more than 3 months.
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