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Cognard type IIa+b dural arteriovenous fistula presenting as a chronic subdural hematoma: A case report
Yoshiki Mochizuki1, Takuma Maeda1, Akio Teranishi1
1Department of Endovascular Neurosurgery and Cerebrovascular Surgery, Saitama Medical University International Medical Center, Yamane, Hidaka, Japan.
Background:
Dural arteriovenous fistula (DAVF) has been reported as a rare cause of chronic subdural hematoma (CSDH); however, CSDH associated with a Cognard type IIa+b DAVF has not been reported.
Case Description:
A 56-year-old woman without traumatic history presented with headache and was diagnosed with right-sided CSDH and a transverse-sigmoid sinus DAVF. She underwent transvenous and transarterial embolization along with burr-hole drainage. Although residual shunting persisted after the first session, complete resolution was achieved after the third. Over 4 years of follow-up, there was no recurrence of CSDH or DAVF.
Conclusion:
This case highlights that DAVFs can cause CSDH regardless of the Cognard type, and that combined curative DAVF treatment and drainage may be effective.
