PMC3358958_01
T1-weighted images show a mass lesion under the scalp of the left temporoparietal region
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F1
A vascular mass under the scalp in the left temporoparietal region, demonstrating high contrast, was detected on magnetic resonance imaging (MRI) [Figure 1].
Carotid angiography demonstrates large, tortuous dilated venous structures as well as large AVM
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F2
The feeding arteries were the left superficial temporal artery (STA) and the left facial artery, while the draining vein was the left external jugular vein  [Figure 2].
AVM is seen to be removed totally on the postoperative T1-weighted magnetic resonance images
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F3
Surgical excision was performed without complications, with complete excision of the AVM, including the feeding artery and draining vein [Figure 3].
Various sized vessels are seen between fat and muscle tissue (H and E x40)
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F4
Endothelial cells and perivascular cells in capillary arteries were positive with immunohistological staining for vascular endothelial growth factor (VEGF); the major feeding arteries and draining vein were VEGF-negative [Figure 4].