[Subdural abscess as a complication of halo fixator].

Complications associated with the application of a halo device are not infrequent; however, osteomyelitis of the skull with a consecutive subdural abscess is a rare but severe complication. We present the case of a patient with a subdural abscess as a result of a local pin-track infection of the halo device, in whom pathological behavior was the primary clinical finding. The possible complications associated with the halo device are discussed with emphasis on associated head injuries and preexisting neurological diseases, as well as indications for the halo, clinical symptoms of pin-track infections, necessary diagnostic measurements and the appropriate treatment.