Which tumor is the most common in the parotid gland?

The pleomorphic adenoma is recognized as the most common tumor in the parotid gland. This tumor is often referred to as a "benign mixed tumor," as it consists of both epithelial and mesenchymal components. It typically presents as a painless, slow-growing mass and is more frequently observed in adults, particularly in middle-aged women.

Furthermore, pleomorphic adenomas are characterized by their variability in histological appearance and their ability to undergo malignant transformation if left untreated for a long time. This tumor's benign nature means that it is the most frequently diagnosed salivary gland tumor, accounting for approximately 60-80% of all parotid gland tumors.

In comparision to other tumors such as adenoid cystic carcinoma, mucoepidermoid carcinoma, and squamous cell carcinoma, which may present either more rarely or with different histopathological features, the prevalence and benign characteristics of pleomorphic adenoma make it distinctly the most common tumor associated with the parotid gland.