Which term describes a rounded prominence located posterior to the maxillary third molars?

• A. Lateral fossa.
• B. Inferior nasal concha.
• C. Anterior nasal spine.
• D. Maxillary tuberosity.

Answer: (D)

In maxillary radiographic anatomy, the rounded prominence behind the last upper molar is the maxillary tuberosity. This part of the posterior maxilla sits just distal to the third molar and forms the posterior boundary of the maxillary sinus. The description in the question matches this location exactly, making it the correct term. The other structures described reside in different areas: the lateral fossa is a depression between the canine and lateral incisor, the inferior nasal concha is a curved bone within the nasal cavity, and the anterior nasal spine is a small projection at the front of the maxilla where the nasal bones meet. Understanding the tuberosity helps with radiographic interpretation and procedures near the back of the upper jaw.