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Salivary gland tumors account for 3% of the head and neck tumors. Pleomorphic Adenoma is the most common salivary gland tumor which constitutes for about 60% of all major and minor salivary gland tumors. Among the minor salivary glands tumors, pleomorphic adenoma makes about 70% and the most common site in the oral cavity is the palatal area, followed by the lip, buccal mucosa, floor of mouth, tongue, tonsil, pharynx, retromolar trigone, and gingiva. Females are more commonly affected than males. Pleomorphic adenoma of the hard palate presents as a painless firm submucosal mass without tenderness, ulceration, or surrounding inflammation; usually lacking a well-defined capsule and frequently involves periosteum or bone.These tumors are located laterally, and they rarely cross the midline.
Chawda et al. (Tue,) studied this question.