## **Core Concept**
Le Facies Sympathique, also known as "sympathetic facies," refers to a clinical sign characterized by a specific facial appearance associated with **sympathetic nervous system** stimulation or disorders. This includes features like a smooth, pale face with a pinched nose and sunken eyes.

## **Why the Correct Answer is Right**
The correct answer, **C. Tabes dorsalis**, is associated with Le Facies Sympathique. Tabes dorsalis is a complication of **neurosyphilis** that affects the **dorsal columns** and **roots** of the spinal cord, leading to sensory ataxia. The condition can cause **pupillary abnormalities**, including Argyll Robertson pupils, which are small, irregular pupils that constrict when focusing on a near object (accommodate) but do not react or react poorly to light. These pupillary changes can be associated with the sympathetic nervous system dysfunction, manifesting as Le Facies Sympathique.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is blank and cannot be evaluated.
- **Option D:** This option is blank and cannot be evaluated.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that Le Facies Sympathique can be seen in conditions affecting the **autonomic nervous system**, including neurosyphilis. Recognizing this facial appearance can prompt further investigation into autonomic dysfunction and potential neurosyphilis.

## **Correct Answer:** . Tabes dorsalis