Advanced Dental Admission Test (ADAT)

What is the most common malignant salivary gland tumor?

1. Adenoid Cystic Carcinoma

2. Warthin's Tumor

3. Mucoepidermoid Carcinoma

4. Acinic Cell Carcinoma

The correct answer is: Adenoid Cystic Carcinoma

The most common malignant salivary gland tumor is mucoepidermoid carcinoma. This type of tumor is characterized by its diverse cellular composition, which includes a mixture of mucus-secreting cells and epidermoid (squamous) cells. Mucoepidermoid carcinoma typically arises in the parotid gland but can also occur in minor salivary glands throughout the oral cavity. Its incidence is higher than that of other malignant salivary gland tumors, making it a vital consideration in the differential diagnosis of salivary gland neoplasms. Additionally, this type of carcinoma varies widely in its biological behavior, with some forms exhibiting a low-grade and indolent course, while high-grade variants can be aggressive and associated with a poorer prognosis. In contrast, adenoid cystic carcinoma, while significant, is not as commonly diagnosed as mucoepidermoid carcinoma. Warthin's tumor, also known as papillary cystadenoma lymphomatosum, is a benign tumor and does not fall into the category of malignant tumors. Acinic cell carcinoma, although a recognized malignant tumor of the salivary glands, is much rarer than mucoepidermoid carcinoma. Understanding the prevalence and characteristics