Most common malignant parotid tumour is
**Core Concept**
The parotid gland is a major salivary gland located in the face, and it is a common site for various types of tumors, both benign and malignant. The most common malignant parotid tumor is a type of cancer that arises from the epithelial cells of the gland.
**Why the Correct Answer is Right**
The most common malignant parotid tumor is **Warthin tumor** is incorrect as it is benign. The correct answer is actually **Mucosal-Associated Lymphoid Tissue (MALT) lymphoma** is also not correct as it is less common. The correct answer is **Mucoepidermoid carcinoma**, which is a type of cancer that arises from the salivary gland epithelium. It is the most common malignant salivary gland tumor, accounting for approximately 15-20% of all salivary gland malignancies. Mucoepidermoid carcinoma is characterized by the presence of both mucous and epidermoid cells, and it can range from low-grade to high-grade based on its histological features.
**Why Each Wrong Option is Incorrect**
**Option A:** Warthin tumor is incorrect because it is a benign tumor, not a malignant one.
**Option B:** MALT lymphoma is incorrect because it is a type of non-Hodgkin lymphoma that is less common in the parotid gland.
**Option C:** Adenoid cystic carcinoma is incorrect because it is a type of malignant salivary gland tumor, but it is less common than mucoepidermoid carcinoma.
**Clinical Pearl / High-Yield Fact**
Mucoepidermoid carcinoma is a type of salivary gland tumor that can range from low-grade to high-grade, and it is often diagnosed based on histological features. It is essential to differentiate mucoepidermoid carcinoma from other types of salivary gland tumors, such as Warthin tumor and adenoid cystic carcinoma.
**Correct Answer: C. Mucoepidermoid carcinoma**