Unusual case of bilateral caudate infarcts following pituitary apoplexy.

IMPORTANCE: Cerebral ischemia due to pituitary apoplexy is very rare. It may be caused by vasospasm or direct compression of cerebral vessels by the expanding mass. Bilateral caudate infarcts also are very rare. To our knowledge, this is the first case report that presents pituitary apoplexy causing compression of bilateral anterior cerebral artery branches and leading to bilateral caudate infarcts. OBSERVATIONS: An 81-year-old woman with a pituitary macroadenoma presented with circulatory shock due to pituitary apoplexy. Neurological examination revealed new asymmetric quadriparesis with chronic bilateral visual disturbance. On brain magnetic resonance imaging, she was found to have watershed infarcts in the anterior cerebral artery-middle cerebral artery and middle cerebral artery-posterior cerebral artery watershed zones in addition to bilateral caudate infarcts. CONCLUSIONS AND RELEVANCE: Pituitary apoplexy can cause compression of bilateral anterior cerebral arteries from the expanding mass and lead to bilateral caudate infarcts. It is important to understand the pathophysiology of cerebral ischemia in pituitary apoplexy to improve management.