Salivary gland pleomorphic adenoma in the Netherlands: A nationwide observational study of primary tumor incidence, malignant transformation, recurrence, and risk factors for recurrence

Most salivary gland tumors are benign, with malignancy found in roughly 14% of lesions [1,2]. The most common tumor type is salivary gland pleomorphic adenoma (SGPA), which accounts for more than 70% of benign epithelial tumors. These well-circumscribed tumors with ductal and myoepithelial elements are found in both the major and minor salivary glands with most occurring in the parotid gland. They are more common in women and age at diagnosis is mostly between 40 and 59years old [2,3].

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