On occasion there were reports of foreign body of paranasal sinuses. Most common site is the maxillary sinus. But it is very rare to experience a long-term foreign body in maxillary sinus. There are two types of maxillary foreign bodies according to etiology, one is caused by various traumatic accidents, and the other is iatrogenic cause which mainly retaining gauze or medical instruments after sinus operation or teeth extraction. We experienced an interesting case of over fifty yews resided metal foreign body in maxillary sinus caused sinusitis, and report with a brief literature review.
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