case_images: PMC7644791_01
case_images: The dental X-ray evidenced the "presence of a metal prosthesis located in the left side of the facial skeleton and the absence of areas of apical/radicular osteolysis affecting the teeth".
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case_images: As shown in Fig. 1, the dental X-ray revealed the "presence of a metal prosthesis located in the left side of the facial skeleton and the absence of areas of apical/radicular osteolysis affecting the teeth".
case_images: Sinus computed tomography (CT) executed without contrast evidenced the "presence of a metal foreign body with thread-like shape located in the region of the left maxillary sinus, which determined intense inflammatory reaction of the sinonasal mucosa interesting the same maxillary sinus". Additionally, "the ipsilateral anterior ethmoidal air cells were partially involved". Radiological findings of minor importance were the presence of left concha bullosa and nasal septum deviation, while the other nasal sinuses were within normal limits.
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case_images: Radiological findings of minor importance were the presence of left concha bullosa and nasal septum deviation, while the other paranasal sinuses were within normal limits (Fig. 2).
case_images: Intraoperative picture. The surgeon retrieves the foreign body from the maxillary sinus.
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case_images: Subsequently, left maxillary antrostomy was performed; after enlarging the ostium of the maxillary sinus, a purulent, blackish and fetid discharge was observed (Fig. 3).
case_images: A) The foreign body (metal nail) covered by black encrustations. B) The foreign body after being cleaned.
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case_images: The foreign body was located in correspondence to the anterior wall of the maxillary sinus and finally retrieved; it was described as a metal nail covered by black encrustations (Fig. 4 A, B).