Cerebral foreign body granuloma in brain triggering generalized seizures without obvious craniocerebral injury: A case report and review of the literature

BACKGROUND Intracerebral foreign body granuloma is rarely reported. We present the case of a male patient with a cerebral foreign body granuloma. CASE DESCRIPTION Initial admission of a 67-year-old male patient was after an aphasia followed by secondary generalized seizures. Cranial computed tomography (CCT) showed a metal-dense, wedge-shaped foreign body in the range of the frontal sinus on the left side, breaking through the frontal sinus, and creating a connection to the frontal cerebral lobe. The patient did not report previous trauma or accident. A concomitant inflammatory response could not be excluded in CCT imaging. In clinical examination, the patient showed no sensorimotor deficit. Operative resection and dural reconstruction was performed. Several tiny, metal-like foreign-body fragments and one stone-like body could be detected and removed. Histopathological examination showed an intracerebral granuloma with areas of acute granulocytic inflammatory reaction. CONCLUSION Cerebral foreign body granuloma is a rare entity without initially provoking clinical symptoms, and causing clinical symptoms even years after the initial event. In most reported cases, wooden or metallic bodies are reported. In addition, hemostatic materials and non-resorbable cotton sheets can cause intracerebral granuloma. There is a high risk of infection with a high mortality rate in case of an existent intracranial abscess. In case of first presentation of seizures, a foreign body should be kept in mind if a traumatic injury cannot be reported. Therefore, possible foreign bodies provoking clinical symptoms such as seizures should always be radiologically excluded, and if present and operatively accessible, removal should be done as soon as possible.