Moure&;s sign can be detected in
**Core Concept**
Moure's sign is a clinical finding associated with a specific condition, related to the examination of the patient's vocal cords. It is a significant indicator of a condition that affects the larynx, and understanding its significance is crucial for accurate diagnosis.
**Why the Correct Answer is Right**
Moure's sign is detected in cases of bilateral vocal cord paralysis, where the vocal cords are unable to move properly. This occurs due to the paralysis of the recurrent laryngeal nerves, which are responsible for the innervation of the vocal cords. When the patient attempts to phonate, the paralyzed vocal cords assume an abnormal position, and the examiner can detect a characteristic sign during laryngoscopy. Moure's sign is characterized by the presence of a midline slit in the vocal cords, which is indicative of bilateral vocal cord paralysis.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Moure's sign is not typically associated with unilateral vocal cord paralysis, where only one vocal cord is affected.
* **Option B:** This option is incorrect because Moure's sign is not a feature of laryngeal cancer, which can cause a range of symptoms but is not typically associated with bilateral vocal cord paralysis.
* **Option C:** This option is incorrect because Moure's sign is not a feature of spasmodic dysphonia, a condition characterized by involuntary spasms of the vocal cords.
**Clinical Pearl / High-Yield Fact**
Moure's sign is an important clinical finding that can help differentiate between bilateral vocal cord paralysis and other conditions that affect the larynx. It is essential for clinicians to be aware of this sign and its significance in order to provide accurate diagnoses and treatment plans.
**Correct Answer:** D