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Chronic subdural hematoma (CSDH) generally occurs following a head injury. To our knowledge, no studies have previously reported on the correlation between CSDH and oral and maxillofacial injury. We report the clinical course of 2 patients who suffered from CSDH several months after a mandibular fracture or a multiple facial fracture. In addition, we retrospectively studied the history of oral and maxillofacial injury in 120 patients with CSDH who underwent surgical treatment at the Department of Neurosurgery, Toho University Omori Hospital during the past 5 years. Ten (8.3 %) of the 120 patients had a history of injury limited to the oral and maxillofacial region. All of these patients were older than 40 years, and 5 o the 10 patients were older than 70 years and had sustained minor injury. In conclusion, middle-aged and elderly patients should be carefully followed up for CSDH, even if injury to the oral and maxillofacial region is minor.

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