A web or diaphragm in the larynx may either occur congenitally or be acquired in the form of adhesions following injury to, or ulceration of, the laryngeal mucosa. A congenital web almost invariably occurs in the form of a membrane uniting the vocal cords at the anterior commissure and extending backward for a variable distance. According to Himmelreicher,1 Radasch2 and others, the congenital web represents an arrested development of the larynx. In the embryo the division between the air and the food passage is present during the middle of the second month. In the larynx the two arytenoid mounds and the future vocal cords are in approximation and begin to separate from behind forward during the third month. The failure or arrest of this process leads to the presence of a congenital web. The web is always thickest at the anterior commissure and tends to thin out
IGLAUER S. A NEW PROCEDURE FOR THE TREATMENT OF WEB IN THE LARYNX: REPORT OF A CASE. Arch Otolaryngol. 1935;22(5):597–602. doi:10.1001/archotol.1935.00640030614006
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