Congenital laryngeal cartilage deformity

Congenital laryngeal cartilage malformations are generally classified into three types: 1. Epiglottic malformation occurs at the fifth week of the embryo, and the third and fourth branchial arches fail to grow and fuse from both sides to the midline, and epiglottic bifurcation or bifurcation occurs (congenital double Epiglottis). The epiglottic bifurcation is serpentine. 2. At the eighth week of abnormal thyroid cartilage embryos, the two wing plates from the fourth branchial arch fused from the bottom to the top and formed the thyroid cartilage. If hypoplasia occurs, congenital thyroid cartilage fissures may occur, some are absent or cartilage is softened. As a result, the cartilage collapses during inhalation, causing larynx and obstructive breathing difficulties. Tracheotomy is feasible. 3. Circular cartilage abnormal embryos At week 8, the circular cartilage gradually joined at the midline on the ventral and dorsal sides. If the joint is poor and there are cracks, a congenital laryngeal fissure is formed. There are also congenital hyperplasia of ring cartilage, resulting in congenital larynx stenosis and larynx atresia.