## **Core Concept**
Vulval cancer is a type of gynecological malignancy that affects the vulva, which is the external female genital area. The most common symptom of vulval cancer is related to its location and the type of tissue involved. Understanding the symptomatology is crucial for early detection and management.

## **Why the Correct Answer is Right**
The correct answer, **Pruritus (itching)**, is the most common presenting symptom of vulval cancer. This symptom arises due to the tumor's presence and its effect on the surrounding tissue, leading to irritation and itching. Pruritus can be a significant and persistent symptom that prompts patients to seek medical attention.

## **Why Each Wrong Option is Incorrect**
- **Option A: Pain** - While pain can be a symptom of vulval cancer, especially in more advanced stages, it is not typically the first symptom. Pain might occur due to ulceration or nerve involvement.
- **Option B: Bleeding** - Bleeding, including post-coital or spontaneous bleeding, can occur in vulval cancer but is not usually the initial symptom. It might be seen in more advanced disease or with ulceration of the tumor.
- **Option C: Discharge** - Discharge is not a characteristic first symptom of vulval cancer. While it might be present in some cases, especially if there's an associated infection, it's not the most common initial presentation.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that persistent **pruritus** in postmenopausal women, especially when associated with a vulval lesion, should raise suspicion for vulval cancer. Early detection significantly improves outcomes, making awareness of this symptom crucial.

## **Correct Answer: D. Pruritus.**