What is spasmodic croup (laryngismus stridulus)?

Updated: Oct 09, 2019
  • Author: Germaine L Defendi, MD, MS, FAAP; Chief Editor: Russell W Steele, MD  more...
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Spasmodic croup (laryngismus stridulus) is a noninfectious variant of the disorder, with a clinical presentation similar to that of the acute disease but typically without fever and with less coryza. This type of croup always occurs at night and has the hallmark of reoccurrence in children; hence it has also been called “recurrent croup.” In spasmodic croup, subglottic edema occurs without the inflammation typical in acute viral disease. Although viral illnesses may trigger this variant, the reaction may be of allergic etiology rather than a direct result of an infectious process.

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