case_images: PMC5705932_01
case_images: Brain computerized tomographic angiography (CTA) in axial, sagittal and coronal planes, respectively (a-c). A large isodense mass around the intense enhancement (pseusoaneurysm) indicating a surrounding thrombus, was evident
case_images: SNI-8-281-g001.jpg
case_images: PMC5705932_01_SNI-8-281-g001.jpg
case_images: F1
case_images: Furthermore, a large isodense mass around the hyperdense enhancement was revealed, indicating the surrounding thrombus [Figure 1].
case_images: A three-dimensional reconstruction of the CTA better delineating the pseudoaneurysm anatomy
case_images: SNI-8-281-g002.jpg
case_images: PMC5705932_01_SNI-8-281-g002.jpg
case_images: F2
case_images: A three-dimensional reconstruction of the CTA better delineating the pseudoaneurysm anatomy was performed [Figure 2].
case_images: Intraoperative photograph displaying the left occipital region mass along with its central ulceration. The surgical planning of the wedge-shaped skin incision is demonstrated (a) posterior view (b) lateral view
case_images: SNI-8-281-g003.jpg
case_images: PMC5705932_01_SNI-8-281-g003.jpg
case_images: F3
case_images: The patient was taken to the operating room for resection of the lesion under general anesthesia through a wedge-shaped skin incision encircling the skin ulceration [Figure 3].
case_images: Identification of the left OA after circumferential dissection of the lesion. OA was ligated and divided both proximally and distally to the lesion
case_images: SNI-8-281-g004.jpg
case_images: PMC5705932_01_SNI-8-281-g004.jpg
case_images: F4
case_images: After careful circumferential dissection of the lesion, the OA was identified [Figure 4].
case_images: Pathology Specimen. A "necrotic" component of the lesion underneath the skin ulceration is evident
case_images: SNI-8-281-g005.jpg
case_images: PMC5705932_01_SNI-8-281-g005.jpg
case_images: F5
case_images: Finally, the mass lesion was dissected away from the overlying skin revealing a "necrotic" component of the lesion underneath the skin ulceration [Figure 5].