CONCLUSIONS
In this paper, we reported a case of an unusual metallic foreign body identified in the sinus cavity and that remained asymptomatic for about 40 years. Although there are potential risks for sinus infection, not all retained foreign bodies require immediate removal. Therefore, timing and approach for retrieval should be considered and validated by additional studies. In general, foreign bodies that can easily be removed by an endoscopic approach may prompt surgical removal, while cases with significant risks associated with removal may warrant an observation approach.