**Question:** In a patient with vulval ulcer, which of the following will lead to malignancy?

**Core Concept:** Vulval ulcers can be caused by various factors, including infections, autoimmune diseases, and chemical or physical injuries. Malignancy is a concern in certain cases, particularly when the ulcer is chronic, recurrent, or shows specific histopathological features.

**Why the Correct Answer is Right:**

The correct answer, **C. Squamous cell carcinoma (SCC)**, is the most common type of vulval malignancy. Squamous cell carcinoma occurs when malignant cells replace and invade the squamous epithelium lining the vulva. This type of malignancy is associated with a history of chronic, recurrent, or poorly healing vulval ulcers. Squamous cells are the most common cells found in the vulva, making SCC the most likely type of malignancy in this scenario.

**Why Each Wrong Option is Incorrect:**

A. **Basal cell carcinoma (BCC):** BCC is less common in the vulva compared to SCC. Although it can occur, the question specifically mentions "SCC" as the correct answer, so BCC is incorrect.

B. **In situ carcinoma:** In situ carcinomas are localized to the epithelium and have not invaded the underlying tissue yet. In this context, the question focuses on malignancies that have invaded the tissue, making BCC and in situ carcinoma incorrect.

D. **Malignant melanoma:** Malignant melanomas are less common in the vulva compared to SCC and BCC. The question specifies SCC as the correct answer, so malignant melanoma is incorrect.

**Clinical Pearl:** Chronic, recurrent, or poorly healing vulval ulcers should raise suspicion for underlying malignancy, particularly SCC. Prompt evaluation and biopsy are crucial to confirm the diagnosis and initiate appropriate treatment.

**Correct Answer:** C. Squamous cell carcinoma (SCC)

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**Core Concept:** Malignancies in the vulva can result from chronic, recurrent, or poorly healing vulval ulcers. Squamous cell carcinoma (SCC) is the most common type of vulval malignancy.

**Why the Correct Answer is Right:** Squamous cell carcinoma is the most common type of vulval malignancy due to its origin from the squamous cells that line the vulva.

**Why Each Wrong Option is Incorrect:**

A. Basal cell carcinoma (BCC) is less common in the vulva compared to SCC. Although it can occur, the question specifically mentions SCC as the correct answer, so BCC is incorrect.

B. In situ carcinoma is a precursor stage of cancer where the cells remain within the epithelium and have not invaded the underlying tissue. In this context, the question focuses on malignancies that have invaded the tissue, making in situ carcinoma incorrect.

D. Malignant melanoma is less common in the vulva compared to SCC and BCC. The question specifies SCC as the correct answer, so malignant melanoma is incorrect.

**Clinical Pearl:** Chronic, recurrent, or poorly healing vulval ulcers should raise suspicion for underlying