All of the following statements about lymphoepithelioma of the parotid gland are true, except:
**Core Concept**
Lymphoepithelioma of the parotid gland is a rare type of salivary gland tumor characterized by a distinct histopathological appearance, often associated with Epstein-Barr virus (EBV) infection. This tumor type primarily affects the parotid gland, which is the largest of the salivary glands.
**Why the Correct Answer is Right**
Lymphoepithelioma of the parotid gland is known for its aggressive behavior, often presenting as a rapidly growing mass in the parotid gland. The tumor cells typically display a characteristic "carcinoma-like" appearance under histological examination. EBV infection is commonly implicated in the pathogenesis of lymphoepithelioma, particularly in immunocompromised individuals. The tumor's growth pattern and histological features are distinct from other types of salivary gland tumors.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because lymphoepithelioma of the parotid gland is indeed associated with EBV infection, making this statement true.
**Option B:** This option is incorrect because lymphoepithelioma of the parotid gland is a distinct histopathological entity, not a variant of pleomorphic adenoma, which is a different type of salivary gland tumor.
**Option C:** This option is incorrect because lymphoepithelioma of the parotid gland is characterized by its aggressive behavior and rapid growth, not by its benign nature.
**Clinical Pearl / High-Yield Fact**
Lymphoepithelioma of the parotid gland should be considered in the differential diagnosis of rapidly growing salivary gland tumors, particularly in patients with a history of immunosuppression or EBV infection.
**Correct Answer:** D