Most common cause of chronic laryngeal stenosis is
**Core Concept**
Chronic laryngeal stenosis refers to the narrowing of the laryngeal airway, which can compromise respiratory function. It is a significant concern in patients with a history of prolonged intubation or airway trauma.
**Why the Correct Answer is Right**
The most common cause of chronic laryngeal stenosis is prolonged endotracheal intubation, particularly in patients who have been intubated for an extended period. This is due to the pressure exerted by the endotracheal tube on the laryngeal mucosa, leading to scarring and fibrosis. The prolonged inflammation and tissue damage can result in the narrowing of the laryngeal airway. The cricoid ring, being the narrowest part of the larynx, is particularly susceptible to stenosis.
**Why Each Wrong Option is Incorrect**
* **Option A:** Trauma to the larynx, while a potential cause of acute airway injury, is less likely to result in chronic stenosis compared to prolonged intubation.
* **Option B:** Acute laryngitis is typically a self-limiting condition and does not typically lead to chronic stenosis.
* **Option C:** Malignancy of the larynx is a rare cause of laryngeal stenosis, and other symptoms such as hoarseness or a mass would be more prominent.
**Clinical Pearl / High-Yield Fact**
When managing patients with a history of prolonged intubation, it is essential to closely monitor for signs of laryngeal stenosis, such as stridor or difficulty breathing, and consider timely evaluation by an otolaryngologist.
**Correct Answer: D. Subglottic stenosis following prolonged intubation**