Presentation
Left-sided pulsatile palpable mass in the head.
Patient Data
Age: 45 years
Gender: Female
From the case:
Scalp arteriovenous malformation
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Subcutaneous mass on the left side of the head showing multiple serpiginous flow voids within the lesion which enhance with contrast, in keeping with dilated vessels. The lesion shows feeding branches from the ipsilateral external carotid artery and numerous dilated draining extracranial veins.
Cerebellar parenchyma appears to be shrunken probably due to reduced perfusion, known as the steal phenomenon.
Case Discussion
Scalp AVMs are rare entities. The etiology can be classified into congenital or acquired - usually after trauma or surgery. Most commonly, the presenting symptom is a pulsatile mass.
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