A panoramic radiograph of a patient shows a radiopaque area between the lower premolars with no associated bony destruction or symptoms. The patient recalls having an amalgam restoration in that area years ago. What is the most likely radiographic finding?

An amalgam tattoo is caused by fragments of amalgam embedded in soft tissue or superficial bone during restorative or extraction procedures. On a panoramic radiograph, it appears as a discrete radiopaque area without associated bone destruction, cortical expansion, or root resorption. It is a foreign body and a benign incidental finding. The history of amalgam restoration supports this diagnosis. Clinically, the overlying soft tissue may show a bluish-gray pigmentation (the classic amalgam tattoo appearance).