LAUSR

BACKGROUND Scalp arteriovenous malformation is a rare disease. In terms of treatment, surgical removal is often effective and performed. With the development of endovascular treatments, a combination of surgical removal and embolization is now often performed. CASE DESCRIPTION A 44-year-old male presented with a mass in his left occipital region. Cerebral angiography led to a diagnosis of scalp arteriovenous malformation. Although he had no neurological deficits, perfusion computed tomography (CT) showed a slight decrease in blood flow in the left cerebral hemisphere, which was presumed to have been caused by the scalp arteriovenous malformation. He suffered from sleep disorder caused by tinnitus, and a discomfort with the lesion itself; therefore, we decided to surgically remove the lesion. In order to suppress intraoperative bleeding and safely perform the surgery, preoperative embolization was also planned. After treatment, he had no neurological deficits and sleep disorder improved. Perfusion CT performed after the surgery showed an improvement in cerebral blood flow in the left cerebral hemisphere. CONCLUSIONS Since cerebral blood flow may decrease depending on the progression of the lesion, the cerebral blood flow should be evaluated. Considering the treatment modalities depending on the lesion can provide treatment with less recurrence and higher patient satisfaction.