Neurohypophysis [Neurosurgery Wiki]

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====== Neurohypophysis ======
{{ neurohypophysis.png}}
The [[posterior pituitary]] (or neurohypophysis) is a [[lobe]] of the [[pituitary gland]] that is functionally connected to the [[hypothalamus]] by the [[median eminence]] via a small tube called the [[pituitary stalk]] (also called the [[infundibular stalk]] or the [[infundibulum]]). 

Anatomically, the neurohypophysis consists of the posterior [[pituitary gland]], [[pituitary stalk]], [[infundibulum]], and [[median eminence]]. The cellular elements include pituicytes, microglias, and the distal parts of nerve cells from anastomosed blood vessels and the hypothalamus.
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[[The 2022 World Health Organization classification of tumors of the pituitary gland]] distinguishes the anterior lobe of the [[pituitary gland]] ([[Adenohypophysis]]) from the posterior lobe ([[neurohypophysis]]) and [[hypothalamic tumor]]s. 

Anterior lobe tumors include (i) well-differentiated [[adenohypophyseal tumor]]s that are now classified as [[pituitary neuroendocrine tumor]]s ([[PitNET]]s; formerly known as [[pituitary neuroendocrine tumor]]s), (ii) [[pituitary blastoma]], and (iii) the two types of [[craniopharyngioma]].