Dental OSCE Practice Exam 2025 – The All-in-One Guide to Master Your Clinical Skills!

The most likely diagnosis for a benign mass in the posterior palate is pleomorphic adenoma. This type of tumor, also known as a benign mixed tumor, is primarily associated with the salivary glands and can occur in the hard or soft palate area. Pleomorphic adenomas are particularly common in the minor salivary glands, which are abundant in the palate, making this diagnosis fitting for a mass found specifically in that location.

The characteristics of pleomorphic adenomas include a slow growth rate and a well-defined, firm mass that feels smooth upon palpation, which aligns with the presentation of a benign mass. In some cases, they may be asymptomatic, but surrounding tissues can show some degree of displacement due to the tumor's expansion.

Other options, while potential considerations, do not match as closely to the presentation described. Ossifying fibroma is often associated with the mandible rather than the palate and can present in a more specific demographic. Hemangiomas typically present as vascular lesions and may appear more bluish or purplish in color due to their vascularity, which differentiates them from pleomorphic adenomas. Salivary gland cysts are more likely to present as fluid-filled swellings and might not have the firm and irregular