Background: Pituitary apoplexy (PA) is a rare clinical condition presenting with acute headache, visual disturbance, and disorientation. PA can cause strokes due to acute internal cervical artery occlusion (ICO), which is an extremely rare condition. Arterial spin labeling (ASL) on magnetic resonance imaging (MRI) is a popular technique, which is a quantitative perfusion imaging useful for the diagnosis of ischemia. We report a treatment with acute pseudo-ICO in which ASL on MRI was useful for the decision of surgery timing.

Case Description: A 50-year-old male presented with a sudden headache and nausea. MRI and magnetic resonance angiography revealed a large pituitary tumor and left ICO. However, the left middle cerebral and anterior cerebral arteries were depicted due to a cross-flow through the anterior communicating artery. ASL on MRI showed decreased perfusion of the left hemisphere, suggesting acute ICO. As he had no neurological deficit, we treated him conservatively, following the guidelines. Two days after admission, he presented with sensory aphasia and incomplete right paralysis. Emergency head computed tomography revealed a low-density area in his left temporal lobe. We decided on emergency tumor decompression surgery to prevent ischemic progression. We performed endonasal transsphenoidal surgery. Postoperative MRI showed recanalization of the left internal carotid artery (ICA). His incomplete right paralysis improved immediately after surgery but remains mild sensory aphasia.

Conclusion: ICO-related PA is a very rare occasion but there are few similar reports. Some cases of successful ICO treatment due to PA have been reported, but the question of whether emergency or elective surgery is better remains unanswered. Our case may have been no neurological deficit if we had decided to have surgery on admission. Hypoperfusion of the ICA area due to PA may be an adaptation of emergency surgery. Perfusion images like ASL could be a useful technique to decide on surgery or conservative treatment.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11152547PMC
http://dx.doi.org/10.25259/SNI_842_2023DOI Listing

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