PMC4014819_01
Sequential DSA images from a L ICA injection in AP projection are demonstrated. The pseudoaneurysm is appreciated as an area of ill defined blush (Arrows - Images B, C). Note that the pseudoaneurysm is under-appreciated in terms of its size and difficult to precisely locate
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F1
Subsequent left internal carotid injection revealed a large (12x10 mm) pseudoaneurysm arising from the anterior ethmoidal branch of the ophthalmic artery [Figures 1 and 2].
Lateral views of L ICA injection again demonstrate the pseudoaneurysm (Arrows). There is difficulty in locating exact point of communication of the pseudoaneurysm with the parent vessel and understanding the true extent or size of this lesion
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F2
Subsequent left internal carotid injection revealed a large (12x10 mm) pseudoaneurysm arising from the anterior ethmoidal branch of the ophthalmic artery [Figures 1 and 2].
Axial slice of Dyna CT showing ethmoidal pseudoaneurysm in left orbital region
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F3
A C-arm CT (Dyna CT) carried out in the DSA suite further demonstrated cross-sectional bone anatomy and precisely localized this pseudoaneurysm in the medial anterior left orbit [Figures 3 and 4].
Sagittal slice of Dyna CT showing vascular-to-osseous anatomical location of ethmoidal pseudoaneurysm
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F4
A C-arm CT (Dyna CT) carried out in the DSA suite further demonstrated cross-sectional bone anatomy and precisely localized this pseudoaneurysm in the medial anterior left orbit [Figures 3 and 4].