A case of infected subdural hematoma with an unknown route of infection

Abstract

  A 94‒year‒old Japanese man was found to have an infected subdural hematoma (ISH) during a detailed examination and treatment for a fever of unknown origin. Although the route of infection was unknown, the pathogens were found to be Group G hemolytic streptococcus and anaerobic gram‒positive cocci. The patient responded well to subdural drainage and antimicrobial treatment. Despite his advanced age, the patient had a good outcome and was discharged from the hospital. Proper treatment can result in a favorable outcome; however, an ISH can affect the central nervous system, and several ISH cases have been fatal. Clinicians should be aware that patients with a chronic subdural hematoma and a fever of unknown origin may have infection complications, and thus prompt medical intervention is required.