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(a) Computed tomography scan showing a mass suggestive of tumor near the sellar region. (b) Magnetic resonance angiogram showing a large aneurysm of the left internal carotid artery (ICA). (c) T2-weighted magnetic resonance image revealing the aneurysm extending to the suprasellar region. (d) Cerebral digital subtraction angiogram of the left ICA revealing a giant aneurysm at the cavernous portion extending in the medial direction
