Congenital vocal cord paralysis.

Congenital stridor is rare. The most common presentation for congenital stridor is chronic loud breathing since birth. It is noticed in patients by the first 4 to 6 weeks of life. There are many causes of congenital stridor. Laryngomalacia is the most common cause of congenital stridor. Congenital vocal cord paralysis is the second most common cause of congenital stridor. Vocal cord paralysis in infants and children can be either congenital or acquired and either unilateral or bilateral. Although most commonly the paralysis is idiopathic, there are many causes of acquired vocal cord paralysis. Arnold-Chiari malformation is the most common congenital central nervous system abnormality resulting in vocal cord paralysis, and central nervous system abnormalities usually may cause bilateral vocal cord paralysis. In this article, we report 2 patients with idiopathic congenital vocal cord paralysis. One of them has the unilateral vocal cord paralysis, and the other, bilateral.