## **Core Concept**
Carcinoma of the glottis, a type of laryngeal cancer, typically presents with symptoms related to its impact on vocal cord function. The glottis is the part of the larynx involved in sound production. Given its location, early manifestations often relate to voice changes.

## **Why the Correct Answer is Right**
The correct answer, **hoarseness of voice**, is the most common and earliest manifestation of carcinoma of the glottis. This is because the glottis, specifically the vocal cords, plays a crucial role in voice production. Any lesion, including tumors, affecting this area can alter voice quality. Hoarseness of voice is a significant symptom because it prompts patients to seek medical attention early, relatively speaking, compared to other potential symptoms of laryngeal cancer.

## **Why Each Wrong Option is Incorrect**
- **Option A:** While changes in voice can sometimes be subtle, hoarseness is specifically mentioned as a key symptom. Other voice changes might occur but are less specific.
- **Option B:** Stridor, a high-pitched sound while breathing, usually indicates more advanced disease with significant airway obstruction, not an early manifestation.
- **Option C:** Dysphagia, or difficulty swallowing, might occur in more advanced cases of laryngeal cancer or when the cancer has spread, but it's not the earliest or most common initial symptom of glottis carcinoma.
- **Option D:** A persistent cough might be a symptom of many conditions, including laryngeal cancer, but it is less specific and not as directly related to glottis function as hoarseness.

## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that any patient with persistent hoarseness of voice for more than 2 weeks should be evaluated for laryngeal cancer. This is because early detection significantly improves outcomes. The 2-week threshold is critical as it often prompts physicians to refer patients for a thorough laryngoscopic examination.

## **Correct Answer:** . Hoarseness of voice