What Does This Radiograph Reveal ?

A 37 year old, male patients reported to Department Of OMR, JDC, with the complaint of pain in back region of the jaw. History revealed that he did not use the affected side of the jaws for more than 4 years. It was clinically found that the pain is because of chronic pulpitis in his third molar. A radiograph was also taken.
The radiograph shows an extra radio-opaque mass attached to the distal surface of the crown of third molar.
The question here is to make the most probable diagnosis about the radiopaque mass.
Please write down your answers in the comments section.