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Figure 2a. Acute invasive zygomycosis in a 42-year-old man. (a) Axial contrast-enhanced CT scan shows right ethmoid and sphenoid sinusitis with destruction of the lateral wall of the right sphenoid sinus (arrow). There is invasion of the right cavernous sinus with occlusion of the right internal carotid artery. (b) Proton-density–weighted MR image shows the occlusion of the right internal carotid artery more clearly, with absence of the normal flow void in the artery (arrow). (c) Conventional angiogram obtained with injection of the left internal carotid artery shows cross flow to the right carotid circulation.
