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1·The anterior pituitary gland is perfused by its portal venous system, which passes down the hypophyseal stalk. This unusual vascular supply likely contributes to frequency of pituitary apoplexy.

垂体前叶的血供是由通过垂体柄的垂体门脉系统供应，这种不常见的血供放射可能促进了垂体卒中发生的频率。