Giant arteriovenous malformation of the scalp: A rare case.

Arteriovenous malformation (AVM) of the scalp is a rare extracranial vascular disorder lesion, that arises due to a pathological fistulous connection between the feeding artery and the draining vein, without capillary involvement within the subcutaneous layer. Here, we report a case of a 68-year-old woman who experienced progressively enlarging and throbbing lumps on the scalp in the bilateral frontotemporoparietooccipital region, especially the left, accompanied by a mild headache and minor hair loss. The patient was diagnosed with giant AVM of the scalp after undergoing ultrasonography (USG) and Computed tomography angiography (CTA) examinations. Computed tomography angiography is essential to precisely determine the angiographic architecture of the AVM and to determine further management.